posterior median line n.
The line of intersection of the midsagittal plane with the posterior surface of the body.
- Posterior nasal spine
posterior nasal spine n. The sharp posterior extremity of the nasal crest.
- Posterior palatine foramen
posterior palatine foramen n. See greater palatine foramen.
- Posterior perforated substance
posterior perforated substance n. The bottom of the interpeduncular fossa at the base of the mesencephalon, containing openings for the passage of perforating branches of cerebral arteries.
noun 1. See under . noun, Anatomy. 1. a small, somewhat cherry-shaped double structure attached by a stalk to the base of the brain and constituting the master endocrine gland affecting all hormonal functions in the body, consisting of an anterior region ((anterior pituitary) or (adenohypophysis)) that develops embryonically from the roof of the mouth […]