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Eng ID Term Definition
3241
meridional distance
The difference of LATITUDE bet­ween two points on a map PROJECTION's GRATICULE con­verted to suitable linear units.
3242
meridional orthographic projection
See PROJECTION.
3243
meridional parts
The length of the arc of a MERIDIAN between the EQUATOR and a given PARALLEL on a MERCATOR CHART, expressed in units of 1 MINUTE of LONGITUD... more
The length of the arc of a MERIDIAN between the EQUATOR and a given PARALLEL on a MERCATOR CHART, expressed in units of 1 MINUTE of LONGITUDE at the EQUATOR.
3244
meridional plane
Any plane containing the polar AXIS of the EARTH.
3245
meroplankton
Chiefly the floating development stages (eggs and larvae) of the BENTHOS and NEKTON.
3246
mesa
A high TABLELAND (S.W. and W. United States).
3247
messenger
In oceanographic terminology, a cylindrical metal WEIGHT, usually hinged and with a latch so that it can be fastened around a wire, and sent... more
In oceanographic terminology, a cylindrical metal WEIGHT, usually hinged and with a latch so that it can be fastened around a wire, and sent down to actuate WATER BOTTLES and CURRENT METERS after they have been lowered to the desired DEPTH.
3248
metacentre (or metacenter)
That point in a floating body at which a vertical line drawn through its CENTRE OF BUOYANCY when it is upright meets the vertical line drawn... more
That point in a floating body at which a vertical line drawn through its CENTRE OF BUOYANCY when it is upright meets the vertical line drawn through its CENTRE OF BUOYANCY when it is tip­ped. CENTRE OF GRAVITY of the unsubmerged part of a floating body; for stable EQUILIBRIUM the metacentre must be above the CENTRE OF GRAVITY.
3249
meteor
PHENOMENON other than a CLOUD, observed in the ATMOSPHERE or on the surface of the EARTH, which con­sists of a precipitation, a suspension ... more
PHENOMENON other than a CLOUD, observed in the ATMOSPHERE or on the surface of the EARTH, which con­sists of a precipitation, a suspension or a deposit of aqueous or non-aqueous liquid or solid particles, or a PHENOMENON of the nature of an optical or electri­cal manifestation.
3250
meteoric dust
Atmospheric dust originating from METE­ORS.
3251
meteorite
A METEOR that reaches the surface of the EARTH as a solid particle.
3252
meteorological element
Atmospheric variable or PHENO­ME­NON which characterize the state of the WEATHER at a speci­fic place at a given time: air temperature, A... more
Atmospheric variable or PHENO­ME­NON which characterize the state of the WEATHER at a speci­fic place at a given time: air temperature, ATMOSPHERIC PRESSURE, WIND, HUMIDI­TY, THUNDERSTORM, FOG, PRECIPI­TATION, etc.
3253
meteorological observations
See OBSERVATION.
3254
meteorological optical range table
A table from the Internation­al Visibility Code which gives the code number of meteorological visibil­ity and the meteorolo­gical visibil... more
A table from the Internation­al Visibility Code which gives the code number of meteorological visibil­ity and the meteorolo­gical visibility for several weather conditions such as thin fog (Code No. 4-meteorological visibility 1/2-1 nautical mile); clear (Code No. 7-meteorological visi­bility 5 1/2-11 nautical miles).
3255
meteorological tide
See TIDE.
3256
meteorological visibility
See VISIBILITY.
3257
meteorology
Science of the ATMOSPHERE.
3258
meter
(1) A person who mea­sures. (2) An instrument or apparatus for measuring. (3) A device for measuring a speci­fied thing as in THERMOMETER ... more
(1) A person who mea­sures. (2) An instrument or apparatus for measuring. (3) A device for measuring a speci­fied thing as in THERMOMETER or BAROMETER. See also METRE.
3259
meter wheel
A special block used to measure payed out sampling line at OCEANO­GRAPHIC STATIONS.
3260
method of squares
See SQUARES: METHOD OF.