Definitions

1. noun

A cyst or sac-like structure, especially one containing a parasitic ocellate (a type of protozoan) in the body of an arthropod, such as a crustacean.

“The biologist studied the ocellicysts in the crab’s body to understand their role in its life cycle.”

2. noun

A sac or vesicle, especially one containing fluid or semi-fluid matter.

“The ocellicyst in the animal’s body was filled with a clear, jelly-like substance.”