1) Zoological science 2) Zoology 
Protozoology is the study of protozoan, the `animal-like` (i.e., motile and heterotrophic) protists. This term has become dated as our understanding of the evolutionary relationships of the eukaryota has improved. ...
the study of protozoans. The science had its beginnings in the latter half of the 17th century when Antonie van Leeuwenhoek of the Netherlands first ...
The science concerned with all aspects of the biology and human interest in protozoa. ... Origin: protozoa + G. Logos, study ... (05 Mar 2000) ... 
(pro″to-zo-ol´ә-je) the scientific study of protozoa.
Type: Term Pronunciation: prō′tō-zō-ol′ŏ-jē Definitions: 1. The science concerned with all aspects of the biology and human interest in protozoa.
[n] - the branch of zoology that studies protozoans
protozoology The branch of zoology dealing with protozoa. Cross references of word families related directly, or indirectly, to: 'talk, speak, speech; words, language; tongue, etc.': cit-; clam-; dic-; fa-; -farious; glosso-; glotto-; lalo-; linguo-; locu-; logo-; loqu-; myt...
noun the branch of zoology that studies protozoans