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equatorial

[ee-kwuh-tawr-ee-uh l, -tohr-, ek-wuh-] /ˌi kwəˈtɔr i əl, -ˈtoʊr-, ˌɛk wə-/
adjective
1.
of, relating to, or near an equator, especially the equator of the earth.
2.
of, like, or typical of the regions at the earth's equator:
equatorial temperatures.
noun
3.
a telescope mounting having two axes of motion, one parallel to the earth's axis and one at right angles to it.
4.
a telescope with such a mounting.
Origin of equatorial
1655-1665
1655-65; equator + -ial
Related forms
equatorially, adverb
nonequatorial, adjective
nonequatorially, adverb
transequatorial, adjective
transequatorially, adverb
unequatorial, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for equatorial

equatorial

/ˌɛkwəˈtɔːrɪəl/
adjective
1.
of, like, or existing at or near the equator
2.
(astronautics) (of a telescope) mounted on the perpendicular axes, one of which is parallel to the earth's axis: an equatorial orbit
3.
(astronomy) of or referring to the celestial equator: equatorial coordinates
noun
4.
an equatorial mounting for a telescope
Derived Forms
equatorially, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for equatorial
adj.

1660s, from equator + -al (1).

Online Etymology Dictionary, © 2010 Douglas Harper
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