Protozoan and Protozoon

Protozoan noun - Any of diverse minute acellular or unicellular organisms usually nonphotosynthetic.

Protozoon is a synonym for protozoan. In some cases you can use "Protozoon" instead a noun "Protozoan".

Protozoon noun - Any of diverse minute acellular or unicellular organisms usually nonphotosynthetic.

Protozoan is a synonym for protozoon. You can use "Protozoan" instead the word "Protozoon" as a noun or an adjective.