MDMesoscale Discussion- When conditions actually begin to shape up for severe weather, SPC (Storm Prediction Center) often issues a Mesoscale Discussion…
MD5message-digest algorithm meant for digital signature applications where a large message has to be compressed in a secure manner before being signed with…
MD5 (Message Digest Algorithm #5)The message digest algorithm used in PGP is the MD5 Message Digest Algorithm, placed in the public domain by RSA Data Security, Inc.
MDAAbbreviation for multiple drop array. See: microdroplet array.
MDB (message database)An instance of a database implemented in Exchange server. A single MDB is normally identified as being public or private depending on the type of data…
MDDCMissile Defense Data Center, USASSDC, Huntsville, AL.
MDE (Magnetic Disc Emulation)Software that makes a jukebox look and operate like a hard-drive such that it will respond to all the I/O commands ordinarily sent to a hard drive.
Mean Areal Precipitation(abbrev. MAP)- The average rainfall over a given area, generally expressed as an average depth over the area.
Mean Daily TemperatureThe average of the highest and lowest temperatures during a 24-hour period.
Mean DepthThe average depth of water in a stream channel or conduit. It is equal to the cross-sectional area divided by the surface width.
Mean Doppler VelocityReflectivity-weighted average velocity of targets in a given pulse resolution volume. Usually determined from a large number of successive radar pulses.
Mean Low Water(MLW) - A tidal datum. The average of all the low water heights observed over the National Tidal Datum Epoch.
Mean Lower Low Water(MLLW) - A tidal datum. The average of the lower low water height of each tidal day observed over the National Tidal Datum Epoch.
mean power (of a radio transmitter)The average power supplied to the antenna transmission line by a transmitter during an interval of time sufficiently long compared with the lowest…
Mean Power Output (of a Wind Turbine)The average power output of a wind energy conversion system at a given mean wind speed based on a Raleigh frequency distribution.
Mean Sea Level(MSL) - The arithmetic mean of hourly water elevations observed over a specific 19-year tidal epoch.
Mean sea level (MSL)The arithmetic mean of hourly water elevations observed over a specific 19-year tidal epoch.
mean survival timeThe average time that patients in a clinical study remained alive. The time is measured beginning either at diagnosis or the start of treatment.
mean time between failures (MTBF)A measure of the reliability of an item. Defined as the total functioning life of an item divided by the total number of failures within the population…
mean time between outages (MTBO)In a system, the mean time between equipment failures that result in loss of system continuity or unacceptable degradation.
mean time to repair (MTTR)The total elapsed time for corrective maintenance divided by the total number of corrective maintenance actions during a given period of time.
means testSection 707(b)(2) of the Bankruptcy Code applies a "means test" to determine whether an individual debtor's chapter 7 filing is presumed to be an abuse of…
Means-tested Public BenefitsAssistance from a government unit. Benefits include food stamps, Medicaid, Supplemental Security Income, Temporary Assistance for Needy Families, and…
measles virus(MEE-zulz VY-rus) The virus that causes measles (a highly contagious disease marked by fever, cough, and raised red spots on the skin).
measurable diseaseA tumor that can be accurately measured in size. This information can be used to judge response to treatment.
MeasureA question or proposal submitted in an election for an expression of the voters’ will.
Measure of Effectiveness (MOE)The quantitative expression (sometimes modified by subjective judgment) of the success of a system in achieving a specified objective.
measured blocking thresholdA value for measured blocking above which there is a statistically significant probability that the design blocking objective is not being met. [T1.
Measured CeilingA ceiling classification applied when the ceiling value has been determined by an instrument, such as a ceilometer or ceiling light, or by the known…
measured-rate serviceTelephone service for which charges are made in accordance with the total connection time of the line.
MechanicSomeone who uses sleight-of-hand in order to cheat at cards.
Mechanical equipmentIncludes, but not be limited to, heating, venting and air conditioning equipment, water tanks and their supporting structures, satellite dishes, stair and…
mechanical spliceOf optical fibers, a splice, i.e., permanent joint, accomplished by aligning the mating fibers in some kind of mechanical fixture.
Mechanical SystemsThose elements of building used to control the interior climate.
Mechanical TurkAmazon.com program which allows you to hire humans to perform easy tasks that computers are bad at.
mechanically induced modulationOptical signal modulation induced by mechanical means. Note: An example of deleterious mechanically induced modulation is speckle noise created in a…
mechanically intermateable connectorsConnectors that are mechanically mateable, without creating mechanical damage, and without regard to attenuation properties.