2 definitions
for protozoan
From The Collaborative International Dictionary of English v.0.48 :
Protozoan \Pro`to*zo"an\, a. (Zool.)
Of or pertaining to the Protozoa. -- n. One of the
Protozoa.
[1913 Webster]
From WordNet (r) 2.0 :
protozoan
adj : of or relating to the Protozoa [syn: protozoal, protozoic]
n : any of diverse minute acellular or unicellular organisms
usually nonphotosynthetic [syn: protozoon]
[also: protozoa (pl)]