Variation of the moon

(Astron.) an inequality of the moon's motion, depending on the angular distance of the moon from the sun. It is greater at the octants, and zero at the quadratures.

See also: Variation

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
This new variation of the moon clip-fed "Jerry Miculek Special" .45 ACP revolver has a distinctive cylinder shortened appropriately for the length of the cartridge, with its 4" tapered barrel threaded deeper into the cylinder window of the frame.
In May, ISRO said it had raised Chandrayaan's orbit to "enable further studies on orbit perturbations, gravitational field variation of the Moon and also enable imaging of the lunar surface with a wider swath".
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