/ Dictionary / Index A acicula: Meaning and Definition of Find definitions for: a•cic•u•la Pronunciation: (u-sik'yu-lu), [key] — pl. -lae a needlelike part; spine, bristle, or needlelike crystal. a pl. of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: acicula (Thesaurus) achy acicular 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