equator : Idioms & Phrases
Index
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.
Webster 1913
celestial equator
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noun the great circle on the celestial sphere midway between the celestial poles
equinoctial line; equinoctial; equinoctial circle.
WordNet
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.
Webster 1913
Magnetic equator
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noun an imaginary line paralleling the equator where a magnetic needle has no dip
aclinic line.
WordNet
- . See
Aclinic . - the line around the equatorial parts of the earth at which there is no dip, the dipping needle being horizontal.
