/ Dictionary / Index T thiobacillus: Meaning and Definition of Find definitions for: thi•o•ba•cil•lus Pronunciation: (thī"ō-bu-sil'us), [key] — pl. -cil•li any of several rod-shaped bacteria of the genus Thiobacillus, inhabiting soil, sewage, etc., that derive energy from oxidation of sulfur or sulfur compounds. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thiobacillus (Thesaurus) thioallyl ether thiocarbamide Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language