equator Idioms & Phrases
Axis of the equator, ecliptic, horizon (or other circle considered with reference to the sphere on which it lies)
- the diameter of the sphere which is perpendicular to the plane of the circle. Hutton.
noun the great circle on the celestial sphere midway between the celestial poles
equinoctial line; equinoctial; equinoctial circle.
Equator of the sun ∨ of a planet
- (Astron.), the great circle whose plane passes through through the center of the body, and is perpendicular to its axis of revolution.
noun an imaginary line paralleling the equator where a magnetic needle has no dip
- . See Aclinic.
- the line around the equatorial parts of the earth at which there is no dip, the dipping needle being horizontal.
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