ro·​ti·​fer | \ ˈrō-tə-fər How to pronounce rotifer (audio) \

Definition of rotifer

: any of a class (Rotifera of the phylum Aschelminthes) of minute usually microscopic but many-celled chiefly freshwater aquatic invertebrates having the anterior end modified into a retractile disk bearing circles of strong cilia that often give the appearance of rapidly revolving wheels

Examples of rotifer in a Sentence

Recent Examples on the Web And in one sample collected in 2015, the researchers found this one little rotifer. Karen Hopkin, Scientific American, 17 Aug. 2021 Researchers confirmed the rotifer’s advanced age by radiocarbon dating the surrounding soil. Alex Fox, Smithsonian Magazine, 9 June 2021 The hardy rotifer can live through all manner of conditions, but this is a historic feat even for this tiny creature. Wired, 27 June 2021 Among rotifer classes, bdelloids have the fairly unusual ability to reproduce parthenogenetically—i.e., by cloning—and so the original specimens had already begun to do so. Wired, 27 June 2021 Scientists were able to revive a tiny, multicellular animal called a bdelloid rotifer that had been frozen in the Siberian permafrost for 24,000 years, reports Marion Renault for the New York Times. Alex Fox, Smithsonian Magazine, 9 June 2021 However, while 24,000 years is an awfully long time, this rotifer isn’t the oldest organism to be brought back to life after millennia on ice. Alex Fox, Smithsonian Magazine, 9 June 2021 The threads feast on the fat droplets released, then withdraw, leaving just a shell and bacteria in the depleted rotifer body. Elizabeth Pennisi, Science | AAAS, 25 Feb. 2021 The Notojima strain is the largest L rotifer used by Japanese fish farmers. The Economist, 23 Jan. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'rotifer.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of rotifer

1777, in the meaning defined above

History and Etymology for rotifer

ultimately from Latin rota + -fer

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The first known use of rotifer was in 1777

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Cite this Entry

“Rotifer.” Dictionary, Merriam-Webster, Accessed 16 Jan. 2022.

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More Definitions for rotifer


ro·​ti·​fer | \ ˈrōt-ə-fər How to pronounce rotifer (audio) \

Medical Definition of rotifer

: any member of the class Rotifera

More from Merriam-Webster on rotifer

Nglish: Translation of rotifer for Spanish Speakers Encyclopedia article about rotifer


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