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Meaning of semiminor axis

sem'i•mi'nor ax'is

Pronunciation: (sem'ē-mī'nur, sem'ī-, sem"ē-, sem"ī-), [key]
  1. one half the minor axis of an ellipse.
  2. one half the minor axis of the ellipse that one celestial body describes around another, as a planet around the sun.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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