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Infusoria

[ in-fyoo-sawr-ee-uh, -sohr- ]
/ ˌɪn fyʊˈsɔr i ə, -ˈsoʊr- /
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plural noun
protozoans of the phylum Ciliophora (or class Ciliata).
(formerly) any of various microscopic organisms found in infusions of decaying organic matter.
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Which of the following nouns has an irregular plural form?

Origin of Infusoria

1780–90; <New Latin, neuter plural of infūsōrius.See infuse, -ory1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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