Definition of protozoon in US English:

protozoon

noun

Zoology
  • A single-celled microscopic animal of a group of phyla of the kingdom Protista, such as an amoeba, flagellate, ciliate, or sporozoan; a protozoan.

    ‘parasitic protozoa are among the most important pathogens worldwide’

Pronunciation

protozoon

/ˌproʊdəˈzoʊˌɑn//ˌprōdəˈzōˌän/