The Space-time Continuum

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21 min
Essential Vocabulary for the GRE - The Space-time Continuum

Essential Vocabulary for the GRE
aeonnoun

an endless or lengthy period of time

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perpetualadjective

continuing uninterrupted that seems to last forever

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spasmodicadjective

occurring in spells and often abruptly

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solsticenoun

either of the two times of the year when the sun reaches its farthest or closest distance from the equator

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bicentenarynoun

the 200th anniversary (or the celebration of it)

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centenarynoun

the 100th anniversary (or the celebration of it)

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diurnaladjective

having a daily cycle or occurring every day

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epochnoun

a unit of geological time that is a subdivision of a period and is itself divided into ages

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equinoxnoun

either of two times of the year when the sun crosses the plane of the earth's equator and day and night are of equal length

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to elapse
to elapseverb

(of time) to pass by

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millennialadjective

marking or denoting a time span of a thousand years

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GMTnoun

the time as measured at Greenwich, London, on the line of 0° longitude, used to calculate the time across the globe

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eventualadjective

happening at the end of a process or a particular period of time

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in due courseadverb

at the appropriate time

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to waneverb

(of the moon) have a progressively less significant part of its seeable surface illuminated so that it seems to reduce in size

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twilightnoun

the time in the evening when the sun is below the horizon

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stratosphericadjective

*** ‌(specialist) in the layer of the earth's atmosphere between about 10 and 50 kilometres above the surface of the earth

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to waxverb

(of the moon) have a progressively more significant part of its seeable surface illuminated so that it seems to increase in size

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space-timenoun

the Theory that adds the notion of time to that of a three-dimensional space

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orbitaladjective

of or relating to an orbit

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nebulanoun

a massive cloud of gas and dust in deep space that often appears very bright and can be seen in the sky at night

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umbranoun

a region of complete shadow resulting from total obstruction of light

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meteoroidnoun

a small celestial body that becomes visible as a meteor upon entrance into the atmosphere of the earth

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meteoritenoun

a piece of rock or metal from space that has hit the surface of the earth

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meteornoun

a piece of rock coming from outer space that passes through the Earth's atmosphere, producing light

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magnetic stormnoun

a sudden disturbance of the earth's magnetic field; caused by emission of particles from the sun

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intergalacticadjective

between or among galaxies

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interplanetaryadjective

between or among planets

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interstellaradjective

between or among stars

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hyperspacenoun

(specialist) space that consists of more than three dimensions

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extraterrestrialadjective

originating or located or occurring outside Earth or its atmosphere

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exoplanetnoun

extrasolar planet; a planet that is outside the solar system

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dark matternoun

(physics) material existing in space that reflects no light, based on some theories

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cosmic dustnoun

clouds of particles or gases occurring throughout interstellar space

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coronanoun

the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse

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cometnoun

an object in space that is a mass of ice and dust and when it nears the sun it starts illuminating in the shape of a tail

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aurora australisnoun

the colored lights, mainly green and red, in the sky seen primarily near the southern magnetic pole

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aurora borealis
aurora borealisnoun

the colored lights, mainly green and red, in the sky seen primarily near the northern magnetic pole

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constellationnoun

a specific group of stars that form a pattern and have a name related to their shape

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biospherenoun

the regions of the surface and atmosphere of the Earth (or other planet) where living organisms exist

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