ExpertGlossary terms starting with N

1,509 terms

negative control system A mechanism by which a regulatory protein is required to turn off gene expression.
Negative Energy Balance When producing a fuel takes more energy than the amount of energy the fuel provides.
Negative Equity the condition of owing more on the property than the property is worth.
negative feedback the process by which an initial change brings about an additional change in the opposite direction.
negative justification Synonym de-stuffing.
Negative Keyword Negative Keyword is a term referenced by Google AdWords and is a form of keyword matching.
Negative Limitation A claim limitation that is excusive, e.g., "other than X" "incapable of X", etcetera. MPEP 2173.05(i).
Negative pressure Pressure within a pipe that is less than atmospheric pressure.
Negative Progression Any system of wagering where you increase bets after a loss.
negative pulse stuffing Synonym de-stuffing.
negative selection Selection against individuals possessing a certain character. Opposite: positive selection.
negative self-regulation See: negative autogenous regulation.
Negative SEO The act of demoting a page or site from the SERPS. Most often used against a competitor that is above your site in the SERPS but can be used purely for…
negative test result A test result that fails to show the specific disease or condition for which the test is being done.
Negative Vorticity Advection (Abbrev. NVA) - the advection of lower values of vorticity into an area.
Negative yield curve A negative, or inverted, yield curve results when the interest rate on short-term US Treasury issues is higher than the rate on on long-term Treasury…
negative-acknowledge character (NAK) A transmission control character sent by a station as a negative response to the station with which the connection has been set up.
Negative-tilt Trough An upper level system which is tilted to the west with increasing latitude (i.e., with an axis from southeast to northwest).
Negligence Failure to exercise a generally acceptable level of care and caution resulting in injury or damage to a third party.
Negligence/Negligent A determination of fault in an accident caused by your inattention or carelessness.
Negligencia Dejar de hacer algo que haría una persona razonable guiada por consideraciones normales, o hacer algo que no haría una persona razonablemente prudente.
Negotiable A negotiable contract is one whose terms can be altered by agreement between the parties to the contract.
Negotiable Order of Withdrawal Account (NOW) A savings account from which withdrawals can be made by negotiable orders of withdrawal (functional equivalent of checks).
Negotiable-order-of-withdrawal account A negotiable-order-of-withdrawal (NOW) account is an interest-bearing checking account that pays interest on the balance, usually at a rate comparable to…
Neighborhood Clusters There are 39 Neighborhood Clusters currently used for community planning and related purposes in the District of Columbia.
nelarabine (neh-LA-ruh-been) A drug used to treat certain types of T-cell acute lymphoblastic leukemia (T-ALL) and T-cell lymphoblastic lymphoma (T-LBL).
nelfinavir mesylate A drug that interferes with the ability of a virus to make copies of itself.
NELY Northeasterly
nematode Slender, unsegmented worms, often parasitic. Also known as eelworm, especially when phytoparasitic.
NEMP Nuclear Electromagnetic Pulse.
neo-formation See: organogenesis.
Neo-Traditional Development A traditional neighborhood, where a mix of different types of residential and commercial developments form a tightly knit unit.
Neoadjuvant (nee-oh ad'-joo vunt) chemotherapy is initial use of chemotherapy in patients with localized cancer that could be treated by an alternative but not…
neoadjuvant therapy (NEE-oh-A-joo-vant THAYR-uh-pee) Treatment given before the primary treatment. Examples of neoadjuvant therapy include chemotherapy, radiation therapy…
neomycin phosphotransferase II (Abbreviation: npt-II). An enzyme which detoxifies the antibiotic neomycin, used as a marker gene to select for successfully transformed cells in plant…
Neonatal Intensive Care Unit (NICU) An intensive care unit designed with special equipment to care for premature or seriously ill newborns.
neoplasia (NEE-oh-PLAY-zhuh) Abnormal and uncontrolled cell growth.
neoplasm (NEE-oh-PLA-zum) An abnormal mass of tissue that results when cells divide more than they should or do not die when they should.
neoplastic meningitis (NEE-oh-PLAS-tik MEH-nin-JY-tis) Inflammation of the meninges (three thin layers of tissue that cover and protect the brain and spinal cord) caused by…
Neoprene A synthetic rubber with superior resistance to oils; often used as gasket and washer material.
neor Neomycin-resistance gene. See: antibiotic resistance marker gene, neomycin phosphotransferase II, selectable marker.
neoteny The retention of juvenile body characters in the adult state, or the occurrence of adult characters in the juvenile state.
Neotropic migrant (neotropical) A bird that migrates to tropical regions during the winter.
Neotropical migrants Birds (especially songbirds) that summer in North America but migrate to the tropics for the winter.
NEP (1) Nuclear Electric Propulsion. (2) Nuclear Environment Protection.
NEPA See National Environmental Policy Act of 1969
neper (Np) A unit used to express ratios, such as gain, loss, and relative values. Note 1: The neper is analogous to the decibel, except that the Naperian base 2.
Nephelometric A means of measuring turbidity in a sample by using an instrument called a nephelometer.
Nephelometric turbidity unit (NTU) A measurement unit of the clarity of water, dependent on the amount of suspended matter.
nephrectomy (neh-FREK-toh-mee) Surgery to remove a kidney or part of a kidney. In a partial nephrectomy, part of one kidney or a tumor is removed, but not an entire…
nephrologist (neh-FRAH-loh-jist) A doctor who specializes in diagnosing and treating kidney disease.
Nephropathy Kidney damage when they fail to function. If diabetes damages kidney filters, they become leaky, allowing protein to spill from the blood to urine.
nephrostomy (neh-FROS-toh-mee) Surgery to make an opening from the outside of the body to the renal pelvis (part of the kidney that collects urine).
nephrotomogram (nef-ro-TOE-mo-gram) A series of x-rays of the kidneys. The x-rays are taken from different angles and show the kidneys clearly, without the shadows of…
nephrotoxic (NEH-froh-TOK-sik) Poisonous or damaging to the kidney.
nephroureterectomy (NEF-roh-YER-eh-ter-EK-toh-mee) Surgery to remove a kidney and its ureter. Also called ureteronephrectomy.
NEPSTP Nuclear Electric Propulsion Space flight Test Program.
Nerf To downgrade, to be made softer, or make less effective. "X has been nerfed."
NERN Northeastern
nerve A bundle of fibers that receives and sends messages between the body and the brain.
nerve block A procedure in which medicine is injected directly into or around a nerve or into the spine to block pain.
nerve cell A type of cell that receives and sends messages from the body to the brain and back to the body. The messages are sent by a weak electrical current.
nerve grafting Replacing a damaged nerve with a section of a healthy nerve that has been removed from another part of the body.
nerve growth factor (nurv grohth FAK-ter) A protein made by the body that causes certain nerve cells to grow and helps keep them alive.
nerve-sparing radical prostatectomy (... RA-dih-kul HIS-teh-REK-toh-mee) Surgery to remove the prostate in which an attempt is made to save the nerves that help cause penile erections.
nerve-sparing surgery (SER-juh-ree) A type of surgery that attempts to save the nerves near the tissues being removed.
nervous system (NER-vus SIS-tem) The organized network of nerve tissue in the body. It includes the central nervous system (the brain and spinal cord), the peripheral…
NESDIS National Environmental Satellite, Data, and Information Service. NESDIS collects, processes, stores, analyzes, and disseminates various types of…
NESEAD Naval Electronic Systems Engineering Activity Detachment (USN term).
nest The spot in where are fish, such as a largemouth bass or bluegill, deposits its eggs. Some nests, such as those for largemouth bass, can be well defined.
nested class A class defined inside an enclosing class. See inner class.
nested command menu A command menu within another command menu. See command menu.
Nestin An intermediate filament protein found in cells such as neural and pancreatic precursors.
Nesting Document nesting occurs when one document is inserted within another document (i.e.
Nesting habitat See spotted owl habitat.
Net "Net" means the value of your assets after subtracting your debts.
Net (Lower) Heating Value (NHV) The potential energy available in a fuel as received, taking into account the energy loss in evaporating and superheating the water in the fuel.
Net All-Wave Radiation The net or resultant value of the upward and downward longwave and shortwave radiative fluxes through a plane at the earth-atmosphere interface; a…
net asset value Net asset value is the price set on a fund's units by deducting liabilities from assets and dividing by outstanding units.
Net asset value (NAV) The NAV is the dollar value of one share of a fund. It's calculated by totaling the value of all the fund's holdings plus money waiting investment…
net asset value per share Net asset value of a mutual fund divided by the number of shares or units outstanding.
Net billing The arrangement by which the Bonneville Power Administration financed the cost of nuclear power plants.
net browser Abbreviation for network browser.
Net capability The maximum load-carrying ability of the equipment, exclusive of station use, under specified conditions for a given time interval, independent of the…
Net Capital Gains The amount by which your total long-term capital gain for the year is more than your short-term capital loss for the year.
Net change The difference between the closing price of a stock, bond, or mutual fund, or the last price of a commodity contract, and the closing price on the…
net control station (NCS) A radio station that performs net control functions, such as controlling traffic and enforcing operational discipline. [From Weik '89] 2.
Net cut The cut required, less the fill required, at a particular station or part of a road.
Net domestic product See Net domestic product (NDP)
Net domestic product (NDP) The market value of the goods and services produced by labor and property in the United States less the value of the fixed capital used up in production…
Net economic benefits Economic benefits less economic costs.
Net emissions Applied to greenhouse gas emissions inventory in this report. "Net emissions" means gross emissions (including all industrial activities, mostly fossil…
Net Energy Production (or Balance) The amount of useful energy produced by a system less the amount of energy required to produce the fuel.
Net exports of goods and services Exports of goods and services minus imports of goods and services.
Net fill The fill required, less the cut required, at a particular station or part of a road.
net gain The overall gain of a transmission circuit. Note 1: Net gain is measured by applying a test signal at an appropriate power level (see Note 5) at the input…
Net Generation Equal to gross generation less electricity consumption of a power plant.
Net government saving The difference between government current receipts and government current expenditures, formerly called current surplus or deficit (-), national income…
Net gross receipts See Net gross receipts (NGR)
Net gross receipts (NGR) A statistic tabulated from the tax returns of sole proprietors and partnerships; used in the estimation of nonfarm proprietors' income by state and county.