"equatorial" in the noun sense
1. equatorial
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
"equatorial" in the adjective sense
1. equatorial
of or relating to or at an equator
"equatorial diameter"
2. equatorial
of or relating to conditions at the geographical equator
"equatorial heat"
3. equatorial
of or existing at or near the geographic equator
"equatorial Africa"
Source: WordNet® (An amazing lexical database of English)
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