Ectosarc

noun

1. The ectoplasm of certain protozoans, such as an amoeba.
2. The ectoplasm of a protozoan; the exterior substance of the body of an animal of low organization, as an amœba or other rhizopod or protozoan, in any way distinguished from an endosarc; the usually thicker, denser, tougher, or otherwise modified protoplasm which forms an envelop of the body, as differentiated from the interior substance or contents.
3. The semisolid external layer of protoplasm in some unicellular organisms, as the amœba; ectoplasm; exoplasm.
4. The ectoplasm of an amoeba and similar protozoa