Added 9 October 2026 microbiology /ˌmʌɪkrə(ʊ)bʌɪˈɒlədʒi/ noun Categories: Mind & IdeasUncommon Words noun ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about microbiology at Wordnik → Where our words come from → The branch of biology that deals with microorganisms, especially their effects on man and other living organisms. Related Words: micro-organismbiologymicrobialmicroorganismbacteriologyvirologymycologyprotozoologyalgologyparasitology Back to today's word