cardinal point


n.

One of four points in the pelvic inlet toward which the occiput of the fetus is usually directed in cases of head presentation.
Any of six reference points in the eye: the anterior focal point, posterior focal point, two principal points, and two nodal points.

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Scientific definitions for cardinal point

cardinal point

One of the four principal directions on a compass (north, south, east, or west).
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.