/ Dictionary / Index M micaceous: Meaning and Definition of Find definitions for: mi•ca•ceous Pronunciation: (mī-kā'shus), [key] — adj. consisting of, containing, or resembling mica. of or pertaining to mica. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: micaceous (Thesaurus) mica Micah Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language