A tropical plant, Ananas comosus, native to South America, having thirty or more long, spined and pointed leaves surrounding a thick stem.

In the shape of a pine cone. / Pertaining to the pineal gland.

The pineal gland.

(anatomy, neuroanatomy) A small, pinecone-shaped endocrine gland found near the centre of the brain that produces melatonin.

A single cell within the pineal gland which is involved in melatonin secretion and circadian rhythms.

plural of pineapple

(pathology) A tumour of the pineal gland.

(medicine, surgery) Surgical removal of the pineal gland.

plural of pineal gland

plural of pineal