equatorial plane

noun

, Astronomy.

First recorded in 1890–95

An equatorial plane divides it into two parts, which have equal shares in bounding the segmentation cavity.

By these "two main axes" an equatorial plane is determined, which approximates them to the Discoidea.

The diameter of this equatorial plane is the "minor axis" of the ellipsoid.

Commonly all radial beams lie in the equatorial plane, sometimes also a part of them on both sides of it.

On the margin (in the equatorial plane) three strong pyramidal spines (at the end of the arms).

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