paramecium

[ par-uh-mee-shee-uh m, -shuh m, -see-uh m ]
/ ˌpær əˈmi ʃi əm, -ʃəm, -si əm /

noun, plural par·a·me·ci·a [par-uh-mee-shee-uh, -shuh, -see-uh] /ˌpær əˈmi ʃi ə, -ʃə, -si ə/.

any ciliated freshwater protozoan of the genus Paramecium, having an oval body and a long, deep oral groove.

Origin of paramecium

1745–55; < New Latin < Greek paramḗk(ēs) oblong, oval + New Latin -ium noun suffix; see -ium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for paramecium

paramecium
/ (ˌpærəˈmiːsɪəm) /

noun plural -cia (-sɪə)

any freshwater protozoan of the genus Paramecium, having an oval body covered with cilia and a ventral ciliated groove for feeding: phylum Ciliophora (ciliates)

Word Origin for paramecium

C18: New Latin, from Greek paramēkēs elongated, from para- 1 + mēkos length
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for paramecium

Paramecium
[ păr′ə-mēshē-əm, -sē-əm ]

n.

A genus of freshwater ciliate protozoans, characteristically slipper-shaped and covered with cilia, and commonly used for genetic research and other studies.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for paramecium

paramecium
[ păr′ə-mēsē-əm ]

Plural paramecia parameciums

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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.