Ephippium

·noun A depression in the sphenoid bone; the pituitary fossa.

II. Ephippium ·noun A saddle-shaped cavity to contain the winter eggs, situated on the back of Cladocera.

ephippium
ĕphippĭum, ii, n., = ἐφίππιον, a horse-cloth , caparison , housing (cf. clitellae): tegimen equi ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
ephippium
ephippium ī, n , ἐφίππιον, a pad-saddle, caparison, rug (as a rider's seat): ephippiis uti, Cs.—Pro...

An Elementary Latin Dictionary