/ Dictionary / Index C calvus: Meaning and Definition of Find definitions for: cal•vus Pronunciation: (kal'vus), [key] — adj. Meteorol. (of a cumulonimbus cloud) having its upper portion changing from a rounded, cumuliform shape to a diffuse, whitish, cirriform mass with vertical striations. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. calvous calx Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language