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All terms in this list:

automatic: Capable of operating without external control or intervention.

graphite: An allotrope of carbon consisting of planes of carbon atoms arranged in hexagonal arrays with the planes stacked loosely that is used as a dry lubricant and in "lead" pencils.

biosphere: the part of the Earth and its atmosphere capable of supporting life

homograph: A word that is spelled the same as another but has a different meaning and usually a different etymology.

geometry: (uncountable) The branch of mathematics dealing with spatial relationships.

biodegradable: capable of being decomposed by biological activity, especially by microorganisms

thermometer: An apparatus used to measure temperature.

autograph: A person’s own handwriting, especially the signature of a famous or admired person.

biology: The study of all living matter in all its forms, with respect to the living organism or groups of organisms.

speedometer: A device that measures, and indicates the current speed of a vehicle

geothermal: pertaining to heat energy extracted from reservoirs in the earth's interior

bionic: Related to bionics.

cartographer: One who makes maps or charts.

barometer: An instrument for measuring atmospheric pressure

automobile: An enclosed passenger vehicle powered by an engine.

antibiotics: Plural form of antibiotic.

geology: The science that studies the structure of the earth (or other planets), together with its origin and development, especially by examination of its rocks

thermostat: a device that automatically responds to changes in temperature by activating a heating or cooling system to maintain the temperature at a desired setting

geode: A nodule of stone having a cavity lined with mineral or crystal matter on the inside wall

odometer: An instrument attached to the wheel of a vehicle, to measure the distance traversed.

epigraph: an inscription, especially one on a building etc

autobiography: A self-written biography; the story of one's own life.

biography: someone writes a story about someone else

geography: The study of the physical structure and inhabitants of the Earth.

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Definitions from Wiktionary under the GNU FDL.
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