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[ek-struh-tuh-res-tree-uh l] /ˌɛk strə təˈrɛs tri əl/

outside, or originating outside, the limits of the earth.
an extraterrestrial being:
a science fiction novel about extraterrestrials conquering the earth.
occurring or existing beyond the earth’s atmosphere
(in science fiction) a being from beyond the earth’s atmosphere

also extra-terrestrial, 1812, from extra- + terrestrial. As a noun from 1956.
Originating, located, or occurring outside the Earth or its atmosphere.
extraterrestrial [(ek-struh-tuh-res-tree-uhl)]

A descriptive term for things outside the Earth, such as possible civilizations outside the solar system, or objects, such as meteorites, that actually reach the Earth.


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  • Extraterritorial

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  • Extra time

    noun 1. (sport) an additional period played at the end of a match, to compensate for time lost through injury or (in certain circumstances) to allow the teams to achieve a conclusive result

  • Extratropical-cyclone

    [ek-struh-trop-i-kuh l, ek-] /ˈɛk strəˈtrɒp ɪ kəl, ˌɛk-/ noun 1. any large-scale, cyclonic storm that is not a , especially the common frontal cyclone of the middle and high latitudes. extratropical cyclone (ěk’strə-trŏp’ĭ-kəl) See under cyclone.

  • Extrauterine

    [ek-struh-yoo-ter-in, -tuh-rahyn] /ˌɛk strəˈyu tər ɪn, -təˌraɪn/ adjective 1. being or developing outside the uterus. /ˌɛkstrəˈjuːtəˌraɪn/ adjective 1. situated or developing outside the cavity of the uterus extrauterine ex·tra·u·ter·ine (ěk’strə-yōō’tər-ĭn, -tə-rīn’) adj. Located or occurring outside the uterus.

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