Low Btu GasA fuel gas with a heating value between 90 and 200 Btu per cubic foot.
Low damA dam up to 100 feet high. See medium-height dam and high dam.
Low density materialA material having a low weight per unit volume either as it occurs in its natural state or after compacting it, such as loess with a density of 80 pounds…
Low Earth Orbit (LEO)These satellites are at altitudes between 100 and 400 nautical miles. They have short duration revolutions (about 90 minutes), short visibility envelopes…
Low EndoatmosphereThat portion of the earth's atmosphere, generally below 40 km altitude. 170
Low Flush ToiletA toilet that uses less water than a standard one during flushing, for the purpose of conserving water resources.
Low Frequency(abbrev. LF) The portion of the radio frequency spectrum from 30 to 300 kHz.
low frequency (LF)Any frequency in the band from 30 kHz to 300 kHz. See electromagnetic spectrum.
low gradeWhen referring to cancerous and precancerous growths, a term used to describe cells that look nearly normal under a microscope.
Low Handthis is another name for Hand in Front or two card hand.
Low hazardA downstream hazard classification for dams in which no lives are in jeopardy and minimal economic loss (undeveloped agriculture, occasional uninhabited…
Low Impact Development (LID)An approach to environmentally friendly land use planning. It includes a suite of landscaping and design techniques that attempt to maintain the natural…
Low Impact SystemAn information system in which all three security objectives (i.e., confidentiality, integrity, and availability) are assigned a FIPS 199 potential impact…
low integrity access tokenA filtered access token that is created with a low integrity level. This access token is used by Internet Explorer Protected Mode, but can also be used by…
Low Level Jet(abbrev. LLJ)- A region of relatively strong winds in the lower part of the atmosphere.
low level programming languagesOften known as `assembly languages', these provide little more than the basic instruction set of a particular Central Processing Unit.
Low Power Fm Radio (LPFM)A broadcast service that permits the licensing of 50- to 100-watt FM radio stations within a service radius of up to 3.
Low Power Television (LPTV)A broadcast service that permits program broadcasting via television translators operating with low power.
Low Pressure SystemAn area of a relative pressure minimum that has converging winds and rotates in the same direction as the earth.
Low Water DamA low level dam designed to hold back head waters so as to maintain depth in a certain area. The dam may be visible at the low water stage.
low-dose CAT scanA CAT scan that uses smaller amounts of X-rays than a regular CAT scan.
Low-Down-Payment FeatureA feature of some mortgages, usually fixed-rate mortgages, that helps you buy a home with as little as a 3% down payment.
Low-e windowsLow-emittance (Low-E) refers to very thin coatings on a window primarily used to reduce heat flow through the window.
Low-Emissivity Windows & (Window) FilmsEnergy-efficient windows that have a coating or film applied to the surface of the glass to reduce heat transfer through the window.
low-grade lymphoma(... lim-FOH-muh) A type of lymphoma that tends to grow and spread slowly, and has few symptoms. Also called indolent lymphoma.
low-grade squamous intraepithelial lesion(... SKWAY-mus IN-truh-eh-pih-THEE-lee-ul LEE-zhun) A condition in which the cells of the uterine cervix are slightly abnormal.
Low-head hydroelectricHydroelectric power that operates with a head of 20 meters (approximately 66 feet) or less.
Low-income housingHousing intended to be occupied by low- or moderate-income persons that is eligible for special tax credits under the 1986 tax act.
Low-income populationPersons whose average family income is below the poverty line. The poverty line takes into account family size and age of individuals in the family.
Low-level cloudsLow-level clouds (St, Sc, Ns) Stratus, Stratocumulus, and in some degree, Nimbostratus are low clouds.
Low-level magnetic fieldsFields of force that are generated whenever electric current flows. The sun's average large-scale magnetic field, and the Earth's, exhibit a north and a…
low-level modulationModulation of a signal, e.g., a carrier, at a point in a system or device, such as a radio transmitter, where the power level is low compared to the final…
low-level signalingThe use on signal lines of voltage levels that are between the limits of positive and negative 6 volts. Synonym low-level keying.
low-pass filterA filter network that passes all frequencies below a specified frequency with little or no loss, but strongly attenuates higher frequencies.
low-performance equipmentEquipment that has imprecise characteristics that do not meet system reliability requirements. 2.
low-power communication deviceA restricted radiation device, exclusive of those employing conducted or guided radio frequency techniques, used for the transmission of signs, signals…
Low-Pressure Sodium LampA type of lamp that produces light from sodium gas contained in a bulb operating at a partial pressure of 0.13 to 1.3 Pascal.
Low-Rate Initial Production (LRIP)The production of a system in limited quantity to provide articles for operational test and evaluation, to establish an initial production base, and to…
Lower (Net) Heating ValueThe lower or net heat of combustion for a fuel that assumes that all products of combustion are in a gaseous state. (See Net Heating Value below.)
Lower CourtThe court where a case starts, also known as the “trial court.”
lower GI seriesX-rays of the colon and rectum that are taken after a person is given a barium enema.
Lower heating valueQuantity of heat liberated by the complete combustion of a unit volume or weight of a fuel assuming that the produced water remains as a vapor and the…
Lower Heating Value (LHV)The heating value is the amount of heat released during the combustion of a specific substance, usually a fuel or food.
lower heating value (LLV)The heat produced by combusting one unit of a substance, at atmospheric pressure under conditions such that all water in the products remains in the form…
Lowest FloorThe lowest floor of the lowest enclosed area (including a basement). An unfinished or flood-resistant enclosure, usable solely for parking of vehicles…
lowest usable high frequency (LUF)The lowest frequency in the HF band at which the received field intensity is sufficient to provide the required signal-to-noise ratio for a specified time…
LOWKATRERLow Weight Kinetic Energy Active Tracker.
Lowland FloodingInundation of low areas near the river, often rural, but may also occur in urban areas.
LOWTRANAtmospheric and Interstellar Background Signature Model.
LPAbbreviation for linear programming, linking protection.
LSILA condition in which the cells of the uterine cervix are slightly abnormal. LSIL is not cancer. Also called low-grade squamous intraepithelial lesion.
LSM (Library Storage Module)a tape library containing cells (or slots or bins) in which cartridges are stored, usually for access by an automated cartridge system. See ACS.