/ Dictionary / Index A arachis oil: Meaning and Definition of Find definitions for: ar'a•chis oil" Pronunciation: (ar'u-kis). [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arachidonic acid Arachne Related Content Daily Word Quiz: jaundice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language