• (n.) The semifluid, granular interior of certain unicellular organisms, as the inner layer of sarcode in the amoeba; entoplasm; endoplasta.
En'do·sarc noun [ Endo- + Greek ..., ..., flesh.] (Biol.) The semifluid, granular interior of certain unicellular organisms, as the inner layer of sarcode in the amœba; entoplasm; endoplasta. 
Type: Term Pronunciation: en′dō-sark Definitions: 1. The endoplasm of a protozoan. Synonyms: entosarc
the endoplasm of a protozoan (opposed to ectosarc).