Idioplasma \Id`i*o*plas"ma\, n. [NL., fr. Gr. 'i`dios 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}.
[1913 Webster]