WordReference Random House Learner's Dictionary of American English © 2026
bac•te•ri•ol•o•gy /bækˌtɪriˈɑlədʒi/USA pronunciation
n. [uncountable]
bac•te•ri•ol•o•gist, n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2026- Microbiologya branch of microbiology dealing with bacteria.
bac•te•ri•ol•o•gist, n. [countable]
bac•te•ri•ol•o•gy
(bak tēr′ē ol′ə jē),USA pronunciation n.
bac•te•ri•o•log•i•cal
(bak tēr′ē ə loj′i kəl),USA pronunciation bac•te′ri•o•log′ic, adj.
bac•te′ri•o•log′i•cal•ly, adv.
bac•te′ri•ol′o•gist, n.
- Microbiologya branch of microbiology dealing with the identification, study, and cultivation of bacteria and with their applications in medicine, agriculture, industry, and biotechnology.
- 1880–85; bacterio- + -logy
bac•te′ri•ol′o•gist, n.
'bacteriological' also found in these entries (note: many are not synonyms or translations):