/ Dictionary / Index R rachilla: Meaning and Definition of Find definitions for: ra•chil•la Pronunciation: (ru-kil'u), [key] — pl. -chil•lae a small or secondary rachis, as the axis of a spikelet in a grass inflorescence. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Rachel rachis Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language