Use the “Quick Search” box to locate your required term and/or definition. The following “Search conditions” can be used to refine your search: “Contains”, “Begins with”, “Ends with”, “Equals”, “Does not contain” or “Does not equal.”
Eng ID Term Definition
2081
graduation error
See ERROR OF GRADUATION.
2082
gram(me)
A CGS unit of mass equal to one one-thou­sandth of a KILOGRAMME.
2083
granite
Light-coloured, acidic IGNEOUS ROCK mineral­ogically composed primarily of QUARTZ and potassium-sodium rich feldspars in which the mineral g... more
Light-coloured, acidic IGNEOUS ROCK mineral­ogically composed primarily of QUARTZ and potassium-sodium rich feldspars in which the mineral grains are visible to the naked eye (phaneritic texture).
2084
graphic control survey
See SURVEY.
2085
graphic scale
See SCALE: BAR.
2086
graticule
The network of lines representing MERIDIANS and PARALLELS on a MAP, CHART, or PLOTTING SHEET. See also GRID. A SCALE at the FOCAL PLANE of a... more
The network of lines representing MERIDIANS and PARALLELS on a MAP, CHART, or PLOTTING SHEET. See also GRID. A SCALE at the FOCAL PLANE of an optical instrument to aid in the measurement of objects. See also RETICLE.
2087
graticule adjustment
The transportation or movement of the GRATICULE in order to change the ORIGIN of reference.
2088
gravel
Loose detrital material ranging in size from 2 to 256 mm.
2089
gravimeter
A weighing device or instrument of suffi­cient sensitivity to register variations in the WEIGHT of a constant mass when the mass is moved fr... more
A weighing device or instrument of suffi­cient sensitivity to register variations in the WEIGHT of a constant mass when the mass is moved from place to place on the EARTH and thereby subjected to the influence of GRAVITY at those places. Also called gravity meter.
2090
gravimetric survey
See SURVEY.
2091
graving dock
See DOCK: DRY.
2092
gravitation
In general, the mutual attraction between masses of matter (bodies). Gravitation is the com­ponent of GRAVITY which acts towards the EARTH.
2093
gravity
That force which tends to pull bodies towards the EARTH; that is to give bodies WEIGHT. Gravity is the resultant of two opposing forces: GRA... more
That force which tends to pull bodies towards the EARTH; that is to give bodies WEIGHT. Gravity is the resultant of two opposing forces: GRAVITATION and CENTRIFUGAL FORCE due to the ROTATION of the EARTH.
2094
gravity: centre of
A point at which the mass of the entire body may be regarded as being concentrated.
2095
gravity: direction of
The DIRECTION indicated by a PLUMB LINE. It is perpen­dicular to the surface of the GEOID. Also called direction of the force of gravity.
2096
gravity: intensity of
The magnitude with which GRAVITY acts, expressed in suitable units, usually as an ACCELERATION, in GALS; as a force, in DYNES.
2097
gravity anomaly
The difference between the observed gravity value properly reduced to SEA LEVEL and the theoretical GRAVITY obtained from gravity formula. S... more
The difference between the observed gravity value properly reduced to SEA LEVEL and the theoretical GRAVITY obtained from gravity formula. See BOUGUER ANOMALY, FREE-AIR ANOMALY, ISOSTATIC ANOMALY.
2098
gravity anomaly chart
See CHART.
2099
gravity coring
A method to obtain cores by bottom penetration solely as a result of gravity.
2100
gravity meter
See GRAVI­METER.