/ Dictionary / Index C calathiform: Meaning and Definition of Find definitions for: cal•a•thi•form Pronunciation: (kal'u-thu-fôrm", ku-lath'u-), [key] — adj. cup-shaped; concave. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. calathea calathus Related Content Daily Word Quiz: dilapidated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language