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equatorial (adj.)

1660s, from equator + -ial. Related: Equatorially.

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Definitions of equatorial from WordNet
1
equatorial (adj.)
of or relating to or at an equator;
equatorial diameter
equatorial (adj.)
of or relating to conditions at the geographical equator;
equatorial heat
equatorial (adj.)
of or existing at or near the geographic equator;
equatorial Africa
2
equatorial (n.)
a telescope whose mounting has only two axes of motion, one parallel to the Earth's axis and the other one at right angles to it;
From wordnet.princeton.edu