Dictionary
cir•ro•cu•mu•lus
Pronunciation: (sir"ō-kyOO'myu-lus), [key]—
n.,
—pl. -lus.
a cirriform cloud of a class characterized by thin, white patches, each of which is composed of very small granules or ripples: of high altitude, ab. 20,000–40,000 ft. (6000–12,000 m).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.