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Definition of infusoria
infusoria
/ˌɪn.fjuːˈzɔːr.i.ə/
in · fu · so · ri · a
Plural:infusoria
•Adjective:infusorial
infusoria Lexical Profile
CEFR
C2
Grade
11
Tier
3
Usage
Rare
infusoria Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• noun
1
A collective, largely historical term for microscopic aquatic organisms, particularly ciliates and other protozoa, typically found in freshwater ponds and originally cultured in aqueous infusions of decaying plant material.
Example
"Under his primitive microscope, the biologist was captivated by the active infusoria swimming frantically in the drop of pond water."
Synonyms
View all synonyms for infusoria• Rhymes for infusoria
Word Origin & Etymology
Coined in Modern Latin in the 18th century as the neuter plural of 'infusorius', derived from the Latin 'infusus' (past participle of 'infundere', meaning 'to pour in'). The term was originally applied to microorganisms observed in aqueous infusions of decaying organic matter.
Cite this Entry
Wordmom. (2026). Definition of Infusoria. In Wordmom Dictionary. Retrieved Oct 12, 2026, from https://wordmom.com/dictionary/infusoria