Definitions

1. noun

A cyst that develops in an organ or tissue of a non-human animal, especially in an animal that is not the same species as the animal in which the cyst forms.

“The xenocysts in the rabbit’s liver were a result of the parasitic infection it had contracted from its host species.”

2. noun

A cyst or other abnormal structure that is formed by the inclusion of a foreign body or tissue in an organ or tissue of an organism.

“The surgeon carefully removed the xenocyst from the patient’s skin, which had been caused by an allergic reaction to a new material used in the patient’s medical device.”