The Collaborative International Dictionary
Ectosarc
Ectosarc \Ec"to*sarc\, n. [Ecto- + Gr. ?, ?, flesh.] (Biol.) The semisolid external layer of protoplasm in some unicellular organisms, as the am[oe]ba; ectoplasm; exoplasm.
Wiktionary
ectosarc
n. The ectoplasm of an amoeba and similar protozoa