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Definition of Tentorial notch
1. Noun. (biology) The space in the tentorium where the brainstem passes. ¹
¹ Source: wiktionary.com
Medical Definition of Tentorial notch
1. The triangular opening in the tentorium cerebelli through which the brainstem extends from the posterior into the middle cranial fossa. Synonym: incisura tentorii, notch of tentorium. (05 Mar 2000)