3 definitions found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
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.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Protozoa \Pro`to*zo"a\, n. pl [NL., fr Gr ? first + ? an
animal.] (Zo["o]l.)
The lowest of the grand divisions of the animal kingdom.
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}.
From WordNet r 1.6 [wn]:
Protozoa
n : in some classifications considered a superphylum or a
subkingdom; comprises flagellates; ciliates; sporozoans;
amoebas; foraminifers [syn: {Protozoa}, {phylum Protozoa}]
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