a combining form with the meanings “living substance,” “tissue,” “substance of a cell,” used in the formation of compound words: endoplasm; neoplasm; cytoplasm.

Nearby words

  1. -phyll,
  2. -phyllous,
  3. -phyre,
  4. -phyte,
  5. -plasia,
  6. -plast,
  7. -plastic,
  8. -plasty,
  9. -plasy,
  10. -plegia

Origin of -plasm

combining form representing Greek plásma. See plasma

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for -plasm


n combining form

(in biology) indicating the material forming cellsprotoplasm; cytoplasm
Derived Forms-plasmic, adj combining form

Word Origin for -plasm

from Greek plasma something moulded; see plasma

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 -plasm


word-forming element meaning "a growth, a development; something molded," from Greek -plasma, from plasma "something molded or created" (see plasma).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for -plasm



Material forming cells or tissue:cytoplasm.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.