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Infusoria

[in-fyoo-sawr-ee-uh, -sohr-] /ˌɪn fyʊˈsɔr i ə, -ˈsoʊr-/
plural noun
1.
protozoans of the phylum Ciliophora (or class Ciliata).
2.
(formerly) any of various microscopic organisms found in infusions of decaying organic matter.
Origin
1780-1790
1780-90; < Neo-Latin, neuter plural of infūsōrius. See infuse, -ory1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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