Id`i*o*plas"ma (?), n. [NL., fr. Gr. proper, peculiar + a form, mold.] Biol.
That portion of the cell protoplasm which is the seat of all active changes, and which carries on the function of hereditary transmission; -- distinguished from the other portion, which is termed nutritive plasma. See Hygroplasm.
<-- any modern equivalent? The chromosome/ Genome? -->
© Webster 1913.