Origin of unicellular

First recorded in 1855–60; uni- + cellular
Related formsu·ni·cel·lu·lar·i·ty, noun
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Examples from the Web for unicellular

Historical Examples of unicellular

British Dictionary definitions for unicellular


  1. (of organisms, such as protozoans and certain algae) consisting of a single cell
Derived Formsunicellularity, noun
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

Word Origin and History for unicellular

1858; see uni- + cellular.

Online Etymology Dictionary, © 2010 Douglas Harper

unicellular in Medicine


  1. Having or consisting of a single cell, as the protozoans; one-celled.
Related formsu′ni•cel′lu•lari•ty (-lărĭ-tē) n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

unicellular in Science


  1. Having or consisting of a single cell. Compare multicellular.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.