The Collaborative International Dictionary of English v.0.48:

Entoplastic \En`to*plas"tic\, a. [Ento- + Gr. ? to mold.]
   (Biol.)
   Pertaining to, or composed of, entoplasm; as, the entoplastic
   products of some Protozoa, or the entoplastic modification of
   the cell protoplasm, by which a nucleus is produced.
   [1913 Webster]