/ Dictionary / Index A acaroid resin: Meaning and Definition of Find definitions for: ac'aroid res'in Pronunciation: [key] a red or yellow resin obtained from the trunks of several grass trees, esp. Xanthorrhoea hastilis, used chiefly in varnishes and lacquers and as a substitute for resin. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. acaroid acarology Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language