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semiminor axis

[sem-ee-mahy-ner, sem-ahy-, sem-ee-, sem-ahy-] /ˈsɛm iˈmaɪ nər, ˈsɛm aɪ-, ˌsɛm i-, ˌsɛm aɪ-/
noun
1.
Geometry. one half the minor axis of an ellipse.
2.
Astronomy. one half the minor axis of the ellipse that one celestial body describes around another, as a planet around the sun.
Origin
1925-1930
1925-30; semi- + minor
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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