D defs.my
Entry 1 sense Webster, 1913

Protozoa

/prōtˌ-əz-ō'-ə/ · Pro·to·zo·a · IPA /prˌoʊtəzˈoʊə/
01 n. pl. The lowest of the grand divisions of the animal kingdom.
  1. 1.
    The lowest of the grand divisions of the animal kingdom.(Zool.)