from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An endocytic vacuole through which molecules internalized during endocytosis pass en route to lysosomes
from The Century Dictionary and Cyclopedia
- n. The innermost part of the body of a sponge, composed of endoderm and its associated deep mesoderm, exclusive of the choanosome: distinguished from both choanosome and ectosome.
endo- + -some (Wiktionary)