Definitions

1. adjective

Pertaining to or characterized by pilocytic tumors or cysts, which are usually benign brain tumors originating in the brain’s optic nerve.

“The doctor explained that the patient’s pilocystic tumor was a common and usually non-cancerous condition.”

2. noun

A pilocytic tumor or cyst, especially one occurring in the brain.

“The patient was diagnosed with a pilocystic tumor in the optic nerve.”