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  1. being without cells.
  2. composed of tissue not divided into separate cells, as striated muscle fibers.

Origin of acellular

First recorded in 1935–40; a-6 + cellular
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for acellular


  1. biology not made up of or containing cells
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

acellular in Medicine


  1. Containing no cells; not made of cells.
  2. Devoid of cells; noncellular.
  3. Of or relating to unicellular organisms that do not become multicellular and are complete within a single cell unit.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

acellular in Science


  1. Devoid of cells. The hyphae of some fungi are acellular.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.