ExpertGlossary terms starting with M

2,540 terms

mapper An executable that splits the raw data into key/value pairs. The reducer uses the output of the mapper, called the intermediate results, as its input.
mapping Determining the physical location of a gene or genetic marker on a chromosome. (See Continuous map, Genetic map, Physical map.)
mapping function A mathematical expression relating observed recombination fraction to map distance.
Mapping population The group of related organisms used in constructing a genetic map.
MapReduce See http://hadoop.apache.org/docs/r1.2.0/mapred_tutorial.html.
maps and charts Graphic representation at a reduced scale of selected physical and cultural features of the surface of the earth and other planetary bodies.
MAR Monthly Assessment Report (BMDO/POC term).
marabou jig A weighted jig with light, fluffy feathers attached to the body.
Marble Metamorphic rock formed by the "baking" and recrystallization of limestone.
Marbles Excess rubber build-up above the upper groove of the racetrack. Also known as loose stuff.
Marcaine (MAR-kane) A drug used to relieve pain by blocking signals at nerve endings. It is being studied in the relief of pain following surgery for cancer.
MARCO Marine Corps.
Mare's Trail The name given to thin, wispy cirrus clouds composed of ice crystals that appear as veil patches or strands, often resembling a horse's tail.
MAREP (MArine REPort) A voluntary marine observation program of the National Weather Service whose goal is to solicit meteorological and oceanographic…
Margin See Margin, or margin costs
Margin Account Arrangement with a broker or financial institution permitting a customer to borrow in order to cover the cost of investment purchases.
Margin call To protect the margin loans they make, brokers issue a margin call if your equity in your margin account falls below the required maintenance level of at…
Margin costs See Margin, or margin costs
margin debt The difference between the collateral deposited by the client and the amount borrowed (currently a maximum of 50 percent of the current market value of…
Margin requirement The margin requirement is the minimum amount the Federal Reserve, in Regulation T, requires you to deposit in a margin account before you can trade…
Margin, or margin costs The value of the trade services provided in delivering commodities from producers' establishments to purchasers, where the purchaser pays for the services.
Marginal Cost The cost of producing one additional unit of a product.
Marginal electric generating unit In organized wholesale markets, the price of the marginal source of electricity usually sets the price of the unit providing the next increment or…
Marginal land Land which, in its natural state, is not well suited for a particular purpose, such as raising crops.
Marginal tax rate Because the US income tax system is progressive, your tax rate rises as your taxable income rises through two or more tax brackets.
Marginal Visual Flight Rules (Abbrev. MVFR) - In an aviation product, refers to the general weather conditions pilots can expect at the surface.
marginal zone B-cell lymphoma (MAR-jih-nul zone B-sel lim-FOH-muh) An indolent (slow-growing) type of B-cell non-Hodgkin lymphoma that begins forming in certain areas (the marginal…
marginal zone lymphoma (MAR-jih-nul zone lim-FOH-muh) An indolent (slow-growing) type of B-cell non-Hodgkin lymphoma that begins forming in certain areas (the marginal zones) of…
Marginalia Handwritten notes in the margin of the page in documents.
Margins (mar' jinz) the distance between the edge of the tissue sample removed and abnormal cells.
maribavir (mar-I-buh-veer) A substance that blocks the ability of viruses to make new viruses and infect cells.
mariculture See: aquaculture.
marijuana A type of plant. Extracts of marijuana are being studied for their ability to control severe nausea and vomiting caused by chemotherapy and/or opioid…
marimastat An anticancer drug that belongs to the family of drugs called angiogenesis inhibitors. Marimastat is a matrix metalloproteinase inhibitor.
Marine Air Command and Control System A US Marine Corps tactical air command and control system that provides the tactical air commander with the means to command, coordinate, and control all…
marine broadcast station A coast station which makes scheduled broadcasts of time, meteorological, and hydrographic information. [NTIA]
Marine climate Marine (maritime or oceanic) climate A climate dominated by the ocean. Because of the moderating effect of water, sites having this climate are considered…
Marine Environment (U.S.) ocean or coastal waters (note: coastal waters may include intertidal areas, bays, or estuaries); an area of the Great Lakes or their connecting…
Marine Inversion Temperature inversion produced when cold marine air underlies warmer air.
Marine Managed Area Any area of the marine environment that has been reserved by federal, state, territorial, tribal, or local laws or regulations to provide lasting…
Marine Managed Areas (MMA) Inventory An earlier (2001-2007) database of U.S. aquatic, coastal, or marine sites that have been set aside for the protection of some or all of the natural and…
Marine Planning Areas Distinct marine locations subject to site-specific, ongoing management or regulatory planning within fixed boundaries.
Marine Protected Area Any area of the marine environment that has been reserved by federal, state, territorial, tribal, or local laws or regulations to provide lasting…
Marine Protected Areas (MPA) Inventory A comprehensive inventory of U.S. marine protected areas established or managed by federal, state, or territorial agencies or programs.
Marine Push A replacement of the current air mass with air from off the ocean. Temperatures are much cooler and relative humidities much higher.
Marine Reserve A type of MPA where extractive uses are prohibited (also referred to as "no-take" reserve)
Marine Resource Areas Broad or multiple geographic areas defined by an underlying, mapped marine resource that is afforded some degree of protection through state laws…
Marine Sanctuary As defined by the U.S. government are areas of the marine environment with special national significance due to their conservation, recreational…
Marine Small Craft Thunderstorm Advisory A marine warning issued by Environment Canada Atmospheric Environment Branch when the possibility of thunderstorms is greater than 40 percent.
Marine Small Craft Wind Warning A marine warning issued by Environment Canada Atmospheric Environment Branch for winds which are forecasted to be in the 20-33 knot range inclusive.
Marine Spatial Planning Marine Spatial Planning (MSP) is a comprehensive, ecosystem-based process through which compatible human uses are objectively and transparently allocated…
marine utility station A station in the maritime mobile service consisting of one or more hand-held radiotelephone units licensed under a single authorization.
Marine Waters As defined by U.S. Executive Order 13158 on MPAs: Waters under tidal influence, extending to the Mean High Water mark on land, and into river mouths to a…
Marine Weather Statement A National Weather Service product to provide mariners with details on significant or potentially hazardous conditions not otherwise covered in existing…
Marine Zone Specific, defined over-water areas contained in the various NWS marine forecasts. These are the equivalent of "zones" in the public forecast program.
Marital property Marital property is all property that was acquired during the course of a marriage, even if it is not titled in both names, with some exceptions.
maritime air communications Communications systems, procedures, operations, and equipment that are used for message traffic between aircraft stations and ship stations in the…
Maritime Air Mass An air mass influenced by the sea. It is a secondary characteristic of an air mass classification, signified by the small "m" before the primary…
maritime broadcast communications net A communications net that is used for international distress calling, including international lifeboat, lifecraft, and survival-craft high-frequency (HF)…
maritime mobile service A mobile service between coast stations and ship stations, or between ship stations, or between associated on-board communication stations; survival craft…
maritime mobile-satellite service A mobile-satellite service in which mobile Earth stations are located on board ships; survival craft stations and emergency position-indicating…
Maritime Polar Air Mass An air mass characterized by cold, moist air. Abbreviated mP.
maritime radionavigation service A radionavigation service intended for the benefit and for the safe operation of ships. [NTIA] [RR]
maritime radionavigation-satellite service A radionavigation-satellite service in which Earth stations are located on board ships. [NTIA] [RR]
Maritime Tropical Air Mass An air mass characterized by warm, moist air. Abbreviated mT.
Mark -- see trademark
mark sequence A string of mark bits (sent immediately before message transmission starts) to alert the customer installation (CI) to initiate certain actions. [T1.
Mark to the market When an investment is marked to the market, its value is adjusted to reflect the current market price.
Mark-to-market Adjustment of the book value or collateral value of a security – including a security such as a multiyear contract – to reflect current market value…
Mark/Markup Line by line review and approval/disapproval/modification of the defense budget by congressional committees.
Markdown A markdown is the amount a broker-dealer earns on the sale of a fixed-income security and is the difference between the sales price and what the seller…
marker A diagnostic indication that disease may develop.
marker beacon A transmitter in the aeronautical radionavigation service which radiates vertically a distinctive pattern for providing position information to aircraft.
marker buoy A small plastic buoy, often fluorescent color that is tossed into the water to mark a fish holding area or a school of fish.
marker gene A gene of known function or known location, used for marker-assisted selection or genetic studies.
marker peptide A portion of fusion protein that facilitates its identification or purification.
marker symbol A symbol used to represent a point location such as an airport.
marker-assisted introgression The use of DNA markers to increase the speed and efficiency of introgression of a new allele(s) or gene(s) into a breeding population.
marker-assisted selection (Abbreviation: MAS). The use of DNA markers to improve response to selection in a population.
Market Traditionally, a securities market was a place - such as the New York Stock Exchange (NYSE) - where members met to buy and sell securities.
Market capitalization Value of a corporation as determined by the market price of its issued and outstanding securities.
Market concentration A measure, usually an estimate, of the market share of a participant or groups of participant in the overall market or a submarket (a given region…
Market cycles Market cycles are the recurrent patterns of expansion and contraction that characterize the securities and real estate markets.
market economy An economic system based on private enterprise that rests upon three basic freedoms: freedom of the consumer to choose among competing products and…
Market liquidity The ease, or lack thereof, with which a buyer can buy or a seller can sell at a prevailing price in a marketplace.
Market maker A broker-dealer who is prepared to buy or sell a specific security - such as a bond or at least one round lot of a stock - at a publicly quoted price, is…
Market order An order to buy or sell a security immediately at the best possible price.
Market participant A market buyer or a market seller, or both, that meets reasonable creditworthiness standards established by the market operator.
Market power The ability of any market participant with a large market share to significantly control or affect price by withholding production from the market…
Market Price The price at which a security trades (i.e. could be purchased or sold) in the secondary market.
Market risk Market risk, also known as systematic risk, is risk that results from the characteristic behavior of an entire market or asset class.
Market structure The rules, mechanisms and processes, under which a market operates to form prices, provide benefits and introduce risks to participants, and ultimately…
Market timing Market timing means trying to anticipate the point at which a market has hit, or is about to hit, a high or low turning point, based on historical…
Market Value The price that the market - any market - sets at a particular time as the price at which an asset can be bought or sold.
Market-based rates Rates for power or electric service that are established in an unregulated, competitive market.
Marketer An agent for generation projects who markets power on behalf of the generator. The marketer may also arrange transmission, firming or other ancillary…
Marketing Group of related business activities aimed at satisfying the demand for goods and services.
Marketing Status Marketing status indicates how a drug product is sold in the United States. Drug products in Drugs@FDA are identified as: Prescription Over-the-counter…
Marketplace Maryland Health Connection is a marketplace for consumers and small business owners to compare, shop and enroll in health coverage.
Marking Human readable word or phrase acting as an indicator of all or part of the security constraints that apply to a document so marked [CESG]. See also: Label.