half-moon

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half-moon

1. the moon at first or last quarter when half its face is illuminated
2. the time at which a half-moon occurs
3. Anatomy a nontechnical name for lunula
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

half-moon

[′haf ‚mün]
(astronomy)
The moon as seen in the first quarter and the last quarter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

half-moon

A roughly crescent-shaped fortification outwork. Also see ravelin.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.