Paramecium definition

părə-mēsē-əm, -shē-əm
Any of a genus (Paramecium) of one-celled, elongated, slipper-shaped ciliates moving by means of cilia and having a backward-curving oral groove that ends with the mouth.
noun
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Any of various freshwater protozoans of the genus Paramecium that are usually oval in shape and that move by means of cilia. Although they consist of a single cell, paramecia are large enough to be visible to the naked eye. Like other ciliates, paramecia contain two nuclei, a macronucleus and a micronucleus. On the cellular surface is a groove that opens into a gullet, into which food particles are absorbed.
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Any of various slipper-shaped freshwater ciliate protozoans of the genus Paramecium, having an oral groove for feeding.
noun
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Any of various slipper-shaped freshwater ciliate protozoans of the genus Paramecium, having an oral groove for feeding.
noun
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(zoology) An oval-shaped protozoan organism of the genus Paramecium.
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Other Word Forms

Noun

Singular:
paramecium
Plural:
paramecia, parameciums

Origin of paramecium

  • New Latin Paramēcium genus name from Greek paramēkēs oblong in shape para- alongside para–1 mēkos length māk- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Ancient Greek παραμήκης (paramÄ“kÄ“s, “oval"), from μῆκος (mÄ“kos, “length").

    From Wiktionary