equatorially

e·qua·to·ri·al

 (ē′kwə-tôr′ē-əl, ĕk′wə-)

adj.

1.

a. Of, relating to, or resembling the earth's equator.

b. Relating to conditions that exist at the earth's equator: equatorial heat.

2. Being or having a mounting with two perpendicular axes, one of which is parallel to the earth's rotational axis, allowing a telescope so mounted to track a celestial object for long periods with adjustments only to that axis.

n.

A telescope having an equatorial mounting.

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e′qua·to′ri·al·ly adv.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.