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

combining form representing Greek plásma. See plasma


Anatomy, Physiology. the liquid part of blood or lymph, as distinguished from the suspended elements.
Cell Biology, cytoplasm.
a green, faintly translucent chalcedony.
Physics. a highly ionized gas containing an approximately equal number of positive ions and electrons.
Also, plasm [plaz-uhm] , for defs 1–3.

1705–15; < Late Latin < Greek plásma something molded or formed, akin to plássein to form, mold. See plastic

plasmatic [plaz-mat-ik] , plasmic, adjective
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World English Dictionary
plasm (ˈplæzəm)
1.  protoplasm of a specified type: germ plasm
2.  a variant of plasma

n combining form
(in biology) indicating the material forming cells: protoplasm; cytoplasm
[from Greek plasma something moulded; see plasma]
adj combining form

plasma or plasm (ˈplæzmə)
1.  the clear yellowish fluid portion of blood or lymph in which the red blood cells, white blood cells, and platelets are suspended
2.  short for blood plasma
3.  protoplasm a former name for cytoplasm
4.  physics
 a.  a hot ionized material consisting of nuclei and electrons. It is sometimes regarded as a fourth state of matter and is the material present in the sun, most stars, and fusion reactors
 b.  the ionized gas in an electric discharge or spark, containing positive ions and electrons and a small number of negative ions together with un-ionized material
5.  a green slightly translucent variety of chalcedony, used as a gemstone
6.  a less common term for whey
[C18: from Late Latin: something moulded, from Greek, from plassein to mould]
plasm or plasm
[C18: from Late Latin: something moulded, from Greek, from plassein to mould]
plasmatic or plasm
'plasmic or plasm

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1712, "form, shape" (earlier plasm, 1620), from L.L. plasma, from Gk. plasma "something molded or created," from plassein "to mold," originally "to spread thin," from PIE *plath-yein, from base *pele- "flat, to spread" (see plane (1)). Sense of "liquid part of blood" is from
1845; that of "ionized gas" is 1928.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

plasm (plāz'əm)
Germ plasm.

plasm- pref.
Variant of plasmo-.

-plasm suff.
Material forming cells or tissue: cytoplasm.

plasma plas·ma (plāz'mə) or plasm (plāz'əm)

  1. The clear, yellowish fluid portion of blood, lymph, or intramuscular fluid in which cells are suspended.

  2. Cell-free, sterilized blood plasma, used in transfusions.

  3. Protoplasm or cytoplasm.

plas·mat'ic (plāz-māt'ĭk) or plas'mic (-mĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
plasma   (plāz'mə)  Pronunciation Key 
  1. See blood plasma.

  2. Protoplasm or cytoplasm.

  3. One of four main states of matter, similar to a gas, but consisting of positively charged ions with most or all of their detached electrons moving freely about. Plasmas are produced by very high temperatures, as in the Sun and other stars, and also by the ionization resulting from exposure to an electric current, as in a fluorescent light bulb or a neon sign. See more at state of matter.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
plasma [(plaz-muh)]

A state of matter in which some or all of the electrons have been torn from their parent atoms. The negatively charged electrons and positively charged ions move independently.

Note: Plasmas are usually associated with very high temperatures — most of the sun is a plasma, for example.
plasma [(plaz-muh)]

The liquid part of blood or lymph. Blood plasma is mainly water; it also contains gases, nutrients, and hormones. The red blood cells, white blood cells, and platelets are all suspended in the plasma of the blood.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
She makes a storm in the living plasm and a new adjustment.
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