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 (prō′tə-zō′ən) also pro·to·zo·on (-ŏn′)
n. pl. pro·to·zo·ans or pro·to·zo·a (-zō′ə) also pro·to·zo·ons
Any of numerous chiefly single-celled eukaryotic organisms, most of which move about freely and ingest food, including the amoebas, ciliates, flagellates, and apicomplexans. Protozoans along with certain algae, oomycetes, and some other groups make up the protists.

[From New Latin Prōtozōa, former subkingdom name : proto- + -zōa, pl. of -zōon, -zoon.]

pro′to·zo′an, pro′to·zo′al, pro′to·zo′ic adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Biology) another name for protozoan1
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌproʊ təˈzoʊ ən)

n., pl. -zo•ans, (esp. collectively) -zo•a (-ˈzoʊ ə)
adj. n.
1. any of various one-celled protist organisms that usu. obtain nourishment by ingesting food particles rather than by photosynthesis: classified as the superphylum Protozoa encompassing separate phyla according to means of movement, as by pseudopod, flagella, or cilia.
2. of, pertaining to, or characteristic of a protozoan.
[1860–65; < New Latin Protozo(a) (see proto-, -zoa) + -an1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.protozoon - any of diverse minute acellular or unicellular organisms usually nonphotosyntheticprotozoon - any of diverse minute acellular or unicellular organisms usually nonphotosynthetic
protoctist - any of the unicellular protists
phylum Protozoa, Protozoa - in some classifications considered a superphylum or a subkingdom; comprises flagellates; ciliates; sporozoans; amoebas; foraminifers
sarcodine, sarcodinian - protozoa that move and capture food by forming pseudopods
rhizopod, rhizopodan - protozoa characterized by a pseudopod
arcella - an amoeba-like protozoan with a chitinous shell resembling an umbrella
difflugia - a protozoan with an ovoid shell of cemented sand grains
ciliate, ciliated protozoan, ciliophoran - a protozoan with a microscopic appendage extending from the surface of the cell
euglena - minute single-celled green freshwater organism having a single flagella; often classed as algae
flagellate, flagellate protozoan, flagellated protozoan, mastigophoran, mastigophore - a usually nonphotosynthetic free-living protozoan with whiplike appendages; some are pathogens of humans and other animals
plantlike flagellate - unicellular organisms having many characteristics of typical algae
sporozoan - parasitic spore-forming protozoan
cytostome - mouth of a protozoan
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


n. protozoo, organismo unicelular.
English-Spanish Medical Dictionary © Farlex 2012


n (pl -zoa) protozoo, protozoario; [Nota: protozoan y protozoon se usan intercambiablemente para decir protozoo, pero para decir el plural, no se usa mucho protozoans, sino protozoa.]
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
References in periodicals archive ?
Regarding the number of parasites species detected in each sample, 35.6% were infected with a single parasite species with a single protozoon (n = 41/115), two parasite species 24.3% (n = 28/115); three parasite species 24.3% (n=28/115) and four parasite species 15.6% (n= 18/115) were detected.