tentorial

noun, plural ten·to·ri·a [ten-tawr-ee-uh, –tohr-] /tɛnˈtɔr i ə, -ˈtoʊr-/.

1. Anatomy. an extension of one of the membranes covering the cerebrum which, with the transverse fissure, separates the cerebrum from the cerebellum.
2. Zoology. (of an insect) the internal skeleton of the head.

adj.

1. Relating to a tentorium.

n. pl. ten•to•ri•a (-tôr′ē-ə)

1. A membranous cover or horizontal partition.