/ Dictionary / Index M microbiology: Meaning and Definition of Find definitions for: mi•cro•bi•ol•o•gy Pronunciation: (mī"krō-bī-ol'u-jē), [key] — n. the branch of biology dealing with the structure, function, uses, and modes of existence of microscopic organisms. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: microbiology (Thesaurus) microbicide microblade Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language