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protozoa 音标拼音: [pr ,otəz'oə] n. 原生动物类 原生动物类 Protozoa n 1: in some classifications considered a superphylum or a subkingdom; comprises flagellates; ciliates; sporozoans; amoebas; foraminifers [ synonym: { Protozoa}, { phylum Protozoa}] Protozoon \ Pro` to* zo"[" o] n\ (-[ o^] n), n.; pl. { Protozoa}. [ NL.] ( Zool.) ( a) One of the Protozoa. ( b) A single zooid of a compound protozoan. [ 1913 Webster]
Protozoa \ Pro` to* zo" a\, n. pl. [ NL., fr. Gr. ? first zo^, on an animal.] ( Zool.) 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]
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