equatorial
adjective
equa·to·ri·al
ˌē-kwə-ˈtȯr-ē-əl
ˌe-kwə-
1
a
: of, relating to, or located at the equator or an equator
also
: being in the plane of the equator
a satellite in equatorial orbit
b
: of, originating in, or suggesting the region around the geographic equator
2
a
: being or having a support that includes two axles at right angles to each other with one parallel to the earth's axis of rotation
an equatorial telescope mount
b
: extending in a direction essentially in the plane of a cyclic structure (as of cyclohexane)
equatorial hydrogens
compare axial
Cite this Entry
“Equatorial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/equatorial. Accessed 1 Sep. 2026.
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