Standard Lemma guide

plasm

noun · 5 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • General-American: /ˈplæzəm/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • rhymes with -æzəm

1

noun

Meaning 1

Protoplasm.

Definition source: English Wiktionary via Wiktextract

Usage: archaic, countable, uncountable

Topics: biology, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A mold or matrix in which anything is cast or formed to a particular shape.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

A membrane or cell layer, especially one in an embryo that later develops into a structure; the constituent cells of such a layer.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Examples

  • 1990, Robert Wall, This Side Up: Spatial Determination in the Early Development of Animals, Cambridge University Press, 2005, paperback, page 96, The last chapter showed severe limitations in the concept of 'mosaic' development as it applies to spiralian embryos. It did, however, demonstrate differential segregations occurring at cleavage there, and seen for visibly distinct plasms, some macromolecules and determinants inferred from experimental studies.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

the colorless watery fluid of the blood and lymph that contains no cells, but in which the blood cells (erythrocytes, leukocytes, and thrombocytes) are suspended

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: plasma, blood plasma

Antonyms: none provided

Broader terms: extracellular fluid, ECF

5

noun

Meaning 5

the protoplasm of the germ cells that contains chromosomes and genes

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: germ plasm

Antonyms: none provided

Broader terms: protoplasm, living substance

History

Etymology

From Late Latin plasma (“mold”) or Ancient Greek πλάσμα (plásma, “something formed”), in some cases via German Plasma or French plasme, like English plasma.