/ Dictionary / Index L lac insect: Meaning and Definition of Find definitions for: lac' in"sect Pronunciation: (lak), [key] a scale insect, Laccifer lacca, of southeast Asia, the female of which secretes lac, a substance used in the preparation of shellac, wax, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. laciniate lack Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language