The Collaborative International Dictionary of English v.0.48:

Suspensorium \Sus`pen*so"ri*um\, n.; pl. Suspensoria. [NL.]
   (Anat.)
   Anything which suspends or holds up a part: especially, the
   mandibular suspensorium (a series of bones, or of cartilages
   representing them) which connects the base of the lower jaw
   with the skull in most vertebrates below mammals.
   [1913 Webster]