Definitions

1. adjective

relating to or resembling the pineal gland, a small endocrine gland in the vertebrate brain that secretes melatonin and regulates sleep-wake cycles.

“The pineal gland plays a crucial role in regulating our sleep patterns.”

2. noun

a small endocrine gland in the vertebrate brain that secretes melatonin and regulates sleep-wake cycles.

“The pineal gland is often associated with spiritual and mystical experiences.”