/ Dictionary / Index M mimosaceous: Meaning and Definition of Find definitions for: mim•o•sa•ceous Pronunciation: (mim"u-sā'shus, mī"mu-), [key] — adj. belonging to the Mimosaceae, now regarded as a subfamily (Mimosoideae) of the legume family. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mimosa mimosis Related Content Daily Word Quiz: abominable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language