/ Dictionary / Index A aciniform: Meaning and Definition of Find definitions for: a•cin•i•form Pronunciation: (u-sin'u-fôrm"), [key] — adj. clustered like grapes. acinous. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. acinarious acinous Related Content Daily Word Quiz: novice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language