/ Dictionary / Index A aciform: Meaning and Definition of Find definitions for: ac•i•form Pronunciation: (as'u-fôrm"), [key] — adj. needle-shaped; acicular. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. acierate acinaceous Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language