Infusoria

Infusoria

[in-fyoo-sawr-ee-uh, -sohr-]
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:
1780–90; < Neo-Latin, neuter plural of infūsōrius. See infuse, -ory1

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
infusoria

noun
in some recent classifications, coextensive with the Ciliata: minute organisms found in decomposing infusions of organic matter 
WordNet® 3.0, © 2006 by Princeton University.
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