Added 9 October 2026 bacterial /bækˈtɪəɹiəl/ adjective Categories: Describing WordsEveryday Words adjective ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about bacterial at Wordnik → Where our words come from → Of, relating to, or caused by bacteria. Related Words: bacteriologicalbacteriamicrobialmicrobiologicalbacteriumsalmonellablightbiologicalgermalgallacticbacillar Back to today's word