Definition of "excyst"

excyst

verb
third-person singular simple present excysts, present participle excysting, simple past and past participle excysted
1. (biology, intransitive) To undergo excystation.
  Quotations
  The metacercarias excyst in the duodenum and migrate through the intestinal wall into the body cavity […]
  1957, Charles Franklin Craig, Ernest Carroll Faust, Craig and Faust's Clinical Parasitology, page 561