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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- /
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noun
Geometry. one half the minor axis of an ellipse.
Astronomy. one half the minor axis of the ellipse that one celestial body describes around another, as a planet around the sun.
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Origin of semiminor axis

First recorded in 1925–30; semi- + minor
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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