[L. tentōrium tent, f. tend-ĕre, tent- to stretch: see -ORIUM.]
† 1. A tent-like covering; an awning; a canopy.
1661. Evelyn, Fumifug., Misc. Writ. (1805), I. 230. If there were a solid tentorium, or canopy over London.
2. Anat. A membranous (sometimes ossified) partition between the cerebrum and cerebellum.
1800. Phil. Trans., XC. 435. There is a very uncommon peculiarity in it, which is, that there is a bony falx of some breadth, but no bony tentorium.
1801. Home, ibid., XCII. 78. The tentorium is entirely membranous.
1854. Owen, Skel. & Teeth, in Orr’s Circ. Sc. I. Org. Nat., 232. The parts of the dura mater or outer membrane of the brain, called ‘tentorium,’… are ossified.
1863. Huxley, Man’s Place Nat., ii. 99. What is termed the tentorium—a sort of parchment-like shelf or partition which is interposed between the cerebrum and cerebellum.
1878. Bell, Gegenbaur’s Comp. Anat., 512. In many Mammalia the tentorium is ossified.
