Definitions beginning with M

A system of receiving radio beacon signals and rebroadcasting them on the same frequency to confuse navigation. The meaconing stations cause inaccurate bearings to be obtained by aircraft or ground stations. [JP 1-02]
ATIS - Cite This Source - This Definition
Browse Related Terms: higher frequency ground, lower frequency ground, up-converter

MEADS - permalink - collapse

All > Technology > Defense

See Medium Extended Air Defense System.
DoD Missile Defense Agency - Cite This Source - This Definition
Browse Related Terms: Corps SAM, EAD, EADSIM, EADTBP, Medium Extended Air Defense System (MEADS), UKEADTB

meal plan - permalink - collapse

All > Medicine > Diabetes

A guide to help people get the proper amount of calories, carbohydrates, proteins, and fats in their diet. See also food exchanges.
CDC - Cite This Source - This Definition
Browse Related Terms: Blood Glucose Monitoring, diabetes pills, food exchanges, high blood glucose, low blood glucose, mg/dl, self-monitoring blood glucose, support group, type 1 diabetes, Type 2 diabetes

Mealworms - permalink - collapse

All > Recreation > Fishing

Small beetle larvae often used for catching crappies or sunfish.
AZGFD - Cite This Source - This Definition
Browse Related Terms: Carrying capacity, Mosquitofish, pan fish, Topminnow

mean - permalink - collapse

All > Medicine > Cancer

A statistics term. The average value in a set of measurements. The mean is the sum of a set of numbers divided by how many numbers are in the set.
National Cancer Institute - Cite This Source - This Definition
Browse Related Terms: Cancer Statistics Review (CSR), confidence interval, Fast Stats, georeferenced statistics, Joinpoint software, median, p-value, percent change, quartile, significant, spatial correlation, statistically significant

All > Science > Biotechnology and Genetics > Food Biotechnology

In statistics, the arithmetic average; the sum of all measurements or values in a sample divided by the sample size.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: biometry, correlation, deviation, expected progeny difference, lod score, median, parameter, spatial autocorrelation statistics, Standard deviation, standard error, Variance

All > Science > Weather

The arithmetic average of a set of data (numbers), or the middle point between its two extremes.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Day Length, diurnal, Diurnal Cycles, Tides

Mean Annual Temperature - permalink - collapse

All > Science > Weather

The average temperature for the entire year at any given location.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: anomaly, Diurnal Temperature Range, Maximum Temperature, Mean Daily Temperature, Minimum Temperature, MINT, Sea Surface Temperatures, Temperature Recovery, Thermistor, Weather, Wet-Bulb Temperature

Mean Areal Precipitation - permalink - collapse

All > Science > Weather

(abbrev. MAP)- The average rainfall over a given area, generally expressed as an average depth over the area.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Effective Precipitation, map, PCPN, Point Precipitation, PRCP, PTYPE, Rainfall, SPENES, Weighing-Type Precipitation Gage

Mean Daily Temperature - permalink - collapse

All > Science > Weather

The average of the highest and lowest temperatures during a 24-hour period.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: anomaly, Diurnal Temperature Range, Maximum Temperature, Mean Annual Temperature, Minimum Temperature, MINT, Sea Surface Temperatures, Temperature Recovery, Thermistor, Weather, Wet-Bulb Temperature

Mean Depth - permalink - collapse

All > Science > Weather

In hydrologic terms, the average depth of water in a stream channel or conduit. It is equal to the cross-sectional area divided by the surface width.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Artificial Control, channel, channelization, Drainage Density, Energy dissipator, Meander, Natural Control, Outflow Channel, Outlet Discharge Structure, Thalweg, Weir, Zero Datum

Meander - permalink - collapse

All > Science > Water

Big bend and loops in a river channel as the river snakes through a flat land area.

Bureau of Reclamation - Cite This Source - This Definition
Browse Related Terms: Cofferdam, Intake, Left or right designation, Outlet, Rapid, River corridor, River mile (RM), River outlet works (row), Sinuosity, Terrace

All > Science > Weather

In hydrologic terms, the winding of a stream channel
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Artificial Control, channel, channelization, Drainage Density, Energy dissipator, Mean Depth, Natural Control, Outflow Channel, Outlet Discharge Structure, Thalweg, Weir, Zero Datum

Meander Belt - permalink - collapse

All > Science > Weather

In hydrologic terms, the area between lines drawn tangential to the extreme limits of fully developed meanders
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Muggy, VIL, Wolf Number

Mean Doppler Velocity - permalink - collapse

All > Science > Weather

Reflectivity-weighted average velocity of targets in a given pulse resolution volume. Usually determined from a large number of successive radar pulses. Also called mean radial (towards or away from the antenna) velocity. Doppler velocity refers to spectral density first moment, radial velocity to base data.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Doppler Radar, Isodop, Multiple Doppler Analysis, Radial Velocity, Tornado Vortex Signature, Triple Doppler, TVS

Mean Lower Low Water - permalink - collapse

All > Science > Weather

(MLLW) - A tidal datum. The average of the lower low water height of each tidal day observed over the National Tidal Datum Epoch. For stations with shorter series, simultaneous observational comparisons are made with a control tide station in order to derive the equivalent datum of the National Tidal Datum Epoch.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Mean Low Water, MLLW, MLW, Primary Control Tide Station, Rainfall Estimates

Mean Low Water - permalink - collapse

All > Science > Weather

(MLW) - A tidal datum. The average of all the low water heights observed over the National Tidal Datum Epoch. For stations with shorter series, simultaneous observational comparisons are made with a control tide station in order to derive the equivalent datum of the National Tidal Datum Epoch.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Mean Lower Low Water, MLLW, MLW, Primary Control Tide Station, Rainfall Estimates

Mean number - permalink - collapse

All > Science > Water

The average number.

Bureau of Reclamation - Cite This Source - This Definition
Browse Related Terms: AAM, AGM, Average

mean power (of a radio transmitter) - permalink - collapse

All > Technology > Telecommunications

The average power supplied to the antenna transmission line by a transmitter during an interval of time sufficiently long compared with the lowest frequency encountered in the modulation taken under normal operating conditions. [NTIA] [RR] Note: Normally, a time of 0.1 second, during which the mean power is greatest, will be selected.
ATIS - Cite This Source - This Definition
Browse Related Terms: carrier power (of a radio transmitter), peak envelope power (of a radio transmitter) [PEP, pX, PX], POWER, preemphasis network, pulse amplitude, single-sideband (SSB) equipment reference level