/ Dictionary / Index B Bacillus thuringiensis*: Meaning and Definition of Find definitions for: Bacil'lus thu•rin•gi•en'sis Pronunciation: (thoo-rin"jē-en'sis), [key] a bacterium used in genetically altered form in the biological control of budworms, gypsy moth larvae, Japanese beetles, and other insect pests. Abbr.: B.t. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bacillus Calmette-Guérin bacitracin Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language