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Glossary of Geology Terms
beginning with letter G
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gat Tweet Definition of gat Like Definition of gat on Facebook
noun
  1. (archaic, slang, in old westerns) A Gatling gun.
  2. (slang, 1920's gangster) Any type of gun though usually in reference to a pistol.
<!-- belongs only at gating/gatting? verbto gat
  1. (Irish, slang, North Kerry circa 1989) Forms: 1 gating, gatting: " Used in the progressive tense i.e. Gating or Gatting; primarily with the verb "to go" . 1. To set out to drink (alcohol) with the intention of getting drunk.
    Let's get a flagon of cider and go gatting tonight.
    -->
geochronometry Tweet Definition of geochronometry Like Definition of geochronometry on Facebook
noun
  1. the science of the measurement of the age of rocks etc. based on the radioactive decay of naturally occurring isotopes
geodynamics Tweet Definition of geodynamics Like Definition of geodynamics on Facebook
noun
  1. the branch of geophysics that studies the deformation processes of planetary mantle and crust, and the resulting earthquakes and volcanism
geologic Tweet Definition of geologic Like Definition of geologic on Facebook
adjective
  1. of, or relating to geology or a geologic timescale
  • Portuguese: geolgico
  • Russian: геологичекий
geologist Tweet Definition of geologist Like Definition of geologist on Facebook
noun
  1. A person who is skilled at geology
geology Tweet Definition of geology Like Definition of geology on Facebook
noun (geologies)
  1. The study of earth and land.
geomorphology Tweet Definition of geomorphology Like Definition of geomorphology on Facebook
noun
  1. The study of landforms, their classification, origin, development, and history.
geothermal Tweet Definition of geothermal Like Definition of geothermal on Facebook
adjective
  1. pertaining to heat energy extracted from reservoirs in the earth's interior
geyser Tweet Definition of geyser Like Definition of geyser on Facebook
noun
  1. A boiling spring which throws forth at frequent intervals jets of water, mud, etc., driven up by the expansive power of steam.
  2. (context, British, archaic) An instantaneous, and often dangerous, hot water heater.
    • 1902: William Paton Buchan, Plumbing: A Text-book to the Practice of the Art Or Craft of the Plumber - Where a Geyser or hot-water heater is used it is a good and wise precaution to see that the bath-room, &c., when it is used is well ventilated.
    • 1998: Gordon S Riess, Confessions of a Corporate Centurion: Tales of International Adventures - Water was heated either on the gas stove, or on a wall mounted gas-fired "" heater.
    • 2002: Alaine Polcz, One woman in the war: Hungary, 1944-1945 - It was here I saw a gas water heater in a bathroom for the first time. (I was afraid of it).
glacial Tweet Definition of glacial Like Definition of glacial on Facebook
adjective
  1. of, or relating to glaciers
    • We examined the deposits
      1. suggesting the slow speed of a glacial
    • Work on the new dictionary proceeded at a pace
      1. cold and icy
    • After the rain and frost, the pavements were
      1. having the appearance of ice
    • On cold days, acetic acid will freeze in the bottle
      1. cool and unfriendly
    • He gave me a stare
      Glacial
      1. (geology) of the Pleistocene period dominated by the presence of glaciers
glacier Tweet Definition of glacier Like Definition of glacier on Facebook
noun (plural glaciers)
  1. A large body of ice which moves under its own mass, usually downhill, acting as a juggernaught to all in its path.
graben Tweet Definition of graben Like Definition of graben on Facebook
noun
  1. (geology) an elongated block of the Earth's crust that has dropped relative to the surrounding blocks
gradation Tweet Definition of gradation Like Definition of gradation on Facebook
noun
  1. A sequence of gradual, successive stages; a systematic progression.
  2. A passing by small degrees from one tone or shade, as of color, to another. See Synonyms at nuance.
  3. The act of gradating or arranging in grades.
  1. (music) a gradual change within one parameter, or an overlapping of two blocks of sound.
grain Tweet Definition of grain Like Definition of grain on Facebook
noun
  1. (uncountable) The harvested seeds of various grass-related food crops eg: wheat, corn, barley.
We stored a thousand tons of for the winter.
  1. (countable) A single seed of grain.
a of wheat
  1. (context, countable, uncountable) The crops from which grain is harvested.
The fields were planted with .
  1. (uncountable) A linear texture of a material or surface.
Cut along the of the wood.
  1. (countable) A single particle of a substance.
a of sand
a of salt
  1. (uncountable) A very small unit of weight, in England equal to 1/480 of an ounce troy, 0.0648 grams or, to be more exact, 64.79891 milligrams. A carat grain or pearl grain is 1/4 carat or 50 milligrams. The old French grain was 1/9216 livre or 53.11 milligrams, and in the mesures usuelles permitted from 1812 to 1839, with the livre redefined as 500 grams, it was 54.25 milligrams.
  2. (materials) a region within a material having a single crystal structure or direction
graphic Tweet Definition of graphic Like Definition of graphic on Facebook
noun
  1. a drawing or picture
  2. (in the plural) computer generated images as viewed on a screen forming part of a game or a film etc.
I've just played this new computer game, the graphics are amazing.
adjective
  1. drawn, pictorial
  2. vivid, descriptive
  3. grotesque or otherwise repulsive gory
gravity meter Tweet Definition of gravity meter Like Definition of gravity meter on Facebook
noun
  1. (physics) an instrument that measures the local acceleration due to gravity (strength of the gravitational field)
group Tweet Definition of group Like Definition of group on Facebook
noun
  1. A number of things or persons being in some relation to one another.
There is a of houses behind the hill.
A of people gathered in front of the Parliament to demonstrate against the Prime Minister's proposals.
He left town to join a Communist
  1. (grouptheory) A set with an associative binary operation, under which there exists an identity element, and such that each element has an inverse.
  2. A (usually small) group of people who perform music together.
Did you see the new jazz ?
  1. (astronomy) A small number (up to about fifty) of galaxy, galaxies that are near each other.
  2. (chemistry) A column in the periodic table of chemical elements.
  3. (chemistry) A functional entity consisting of certain atoms whose presence provides a certain property to a molecule, such as the methyl group.
  4. (sociology) A subset of a culture or of a society.
  5. (military) An air force formation.
  6. (geology) A collection of formations or rock strata.
  7. (computing) In the Unix operating system, a number of users with same rights with respect to accession, modification, and execution of files, computers and peripherals.
verb
  1. (transitive) To put together to form a group.
gumbo Tweet Definition of gumbo Like Definition of gumbo on Facebook
noun (gumbos, -)
  1. (countable) The okra plant or its pods.
  2. (uncountable) A soup or stew made with okra.
  3. (uncountable) A fine silty soil that when wet becomes very thick and heavy.

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