Protozoa Pro`to*zo"a, n. pl. [NL., fr. Gr. ? first + zo^,on an animal.] (Zo["o]l.) The lowest of the grand divisions of the animal kingdom. [1913 Webster]

Note: The entire animal consists of a single cell which is variously modified; but in many species a number of these simple zooids are united together so as to form a compound body or organism, as in the Foraminifera and Vorticell[ae]. The reproduction takes place by fission, or by the breaking up of the contents of the body after encystment, each portion becoming a distinct animal, or in other ways, but never by true eggs. The principal divisions are Rhizopoda, Gregarin[ae], and Infusoria. See also {Foraminifera}, {Heliozoa}, {Protoplasta}, {Radiolaria}, {Flagellata}, {Ciliata}. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • protozoa — (n.) 1834, from Modern Latin, coined 1818 by German zoologist Georg August Goldfuss (1782 1848) from Gk. protos first (see PROTO (Cf. proto )) + zoia, plural of zoion animal (see ZOO (Cf. zoo)). Related: Protozoan …   Etymology dictionary

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  • Protozoa — Leishmania donovani, (a species of protozoa) in a bone marrow cell Protozoa are a diverse group of single cell eukaryotic organisms,[1] many of which are motile. Throughout history, protozoa have been defined as single cell protists …   Wikipedia

  • Protozoa — Protozoaire En Biologie, le terme Protozoaire (Protozoa, du grec ancien proto (« premier ») et du suffixe zoa (« animal »)) désigne les protistes (eucaryotes unicellulaires) hétérotrophes qui ingèrent leur nourriture par… …   Wikipédia en Français

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  • Protozoa — Protozoon Pro to*zo [ o]n ( [o^]n), n.; pl. {Protozoa}. [NL.] (Zo[ o]l.) (a) One of the Protozoa. (b) A single zooid of a compound protozoan. [1913 Webster] …   The Collaborative International Dictionary of English

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