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plasm (n.)

1610s, "mold or matrix in which anything is cast or formed to a particular shape" (a sense now obsolete); see plasma. In biology, the meaning "living matter of a cell, protoplasm" is attested by 1864.

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Definitions of plasm from WordNet

plasm (n.)
the protoplasm of the germ cells that contains chromosomes and genes;
Synonyms: germ plasm
plasm (n.)
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;
Synonyms: plasma / blood plasma
From wordnet.princeton.edu