Breadcrumb Home > Dictionary > Index W witchetty grub: Meaning and Definition of Find definitions for: witch'et•ty grub" Pronunciation: (wich'u-tē), [key] the large white larva of any of several species of moth and beetle of Australia, esp. of the moth genus Cossus, occurring in decaying wood and traditionally used as food by Aborigines. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. witches' Sabbath witch grass ✖ Related Content Daily Word Quiz: tautology Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language