follow Dictionary.com

Stories We Like: A Guide to the Comma

protoplasm

[proh-tuh-plaz-uh m] /ˈproʊ təˌplæz əm/
noun
1.
Biology. (no longer in technical use) the colloidal and liquid substance of which cells are formed, excluding horny, chitinous, and other structural material; the cytoplasm and nucleus.
2.
Obsolete. the living matter of organisms regarded as the physical basis of life, having the ability to sense and conduct stimuli.
Origin
1840-1850
1840-50; < Neo-Latin prōtoplasma. See proto-, -plasm
Related forms
protoplasmic, protoplasmal, protoplasmatic
[proh-toh-plaz-mat-ik] /ˌproʊ toʊ plæzˈmæt ɪk/ (Show IPA),
adjective
interprotoplasmic, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for protoplasmal

protoplasm

/ˈprəʊtəˌplæzəm/
noun
1.
(biology) the living contents of a cell, differentiated into cytoplasm and nucleoplasm
Derived Forms
protoplasmic, adjective
Word Origin
C19: from New Latin, from proto- + Greek plasma form
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
Cite This Source
Word Origin and History for protoplasmal
protoplasm
1848, from Ger. Protoplasma (1846), used by Ger. botanist Hugo von Mohl (1805-72), from Gk. proto- "first" + plasma "something molded" (see plasma). The word was in L.L., meaning "first created thing," and may have existed in ecclesiastical Gk. in a different sense. It was used 1839 by Czech physiologist Johannes Evangelista Purkinje (1787-1869) to denote the gelatinous fluid found in living tissue. This word prevailed, though Ger. language purists preferred Urschleim "original mucus."
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
protoplasmal in Medicine

protoplasm pro·to·plasm (prō'tə-plāz'əm)
n.
The complex, semifluid, translucent substance that constitutes the living matter of plant and animal cells and manifests the essential life functions of a cell. Composed of proteins, fats, and other molecules suspended in water, it includes the nucleus and cytoplasm.


pro'to·plas'mic (-plāz'mĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
protoplasmal in Science
protoplasm
  (prō'tə-plāz'əm)   
The semifluid, translucent substance that forms the living matter in all plant and animal cells. Composed of proteins, fats, and other substances suspended in water, it includes the cytoplasm and (in eukaryotes) the nucleus.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
protoplasmal in Culture
protoplasm [(proh-tuh-plaz-uhm)]

The jellylike material in a cell, both inside and outside the nucleus, where the chemical reactions that support life take place.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Encyclopedia Article for protoplasmal

protoplasm

the cytoplasm and nucleus of a cell. The term was first defined in 1835 as the ground substance of living material and, hence, responsible for all living processes. Advocates of the protoplasm concept implied that cells were either fragments or containers of protoplasm. The weakness of the concept was its inability to account for the origin of formed structures within the cell, especially the nucleus. Today the term is used to mean simply the cytoplasm and nucleus. The word protoplasm is somewhat unpopular in modern biology, although the term protoplasmic streaming is commonly used to describe the movement of the cytoplasm.

Learn more about protoplasm with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source

Word of The Day

Difficulty index for protoplasm

Few English speakers likely know this word

Word Value for protoplasmal

0
0
Scrabble Words With Friends

Quotes with protoplasmal