/ Dictionary / Index C calamus: Meaning and Definition of Find definitions for: cal•a•mus Pronunciation: (kal'u-mus), [key] — pl. -mi the sweet flag, Acorus calamus. its aromatic root. any of various tropical Asian palms of the genus Calamus, some of which are a source of rattan. the hollow base of a feather; a quill. See illus. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: calamus (Thesaurus) calamondin calando Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language