\Bi"o*plast\ (-pl[a^]st), n. [Gr. bi`os life +
pla`ssein to form.] (Biol.)
A tiny mass of bioplasm, in itself a living unit and having
formative power, as a living white blood corpuscle; bioblast.
Biology Dictionary
Definition:
A mass of live protoplasm which is functionally independent of other living things. An amebiccell.
Webster's 1913 Dictionary