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  • Webster's Revised Unabridged Dictionary
    • a Basisphenoid (Anat) Of or pertaining to that part of the base of the cranium between the basioccipital and the presphenoid, which usually ossifies separately in the embryo or in the young, and becomes a part of the sphenoid in the adult.
    • n Basisphenoid (Anat) The basisphenoid bone.
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Century Dictionary and Cyclopedia
    • basisphenoid In anatomy, pertaining to the body or basis of the compound sphenoid bone.
    • n basisphenoid In anatomy, the centrum of the second cranial segment, or basis, of the compound sphenoid bone, represented in human anatomy by the greater part of the body of the sphenoid (all that part behind the sella turcica), as distinguished from its wings and pterygoid processes, situated in the basicranial axis of the skull, between the basioccipital and the presphenoid. It is always combined with other sphenoidal elements, and frequently ankyloses also with the basioccipital. See cuts under Crotalus, Esox, andsphenoid.
    • n basisphenoid In ichthyology, a bone attached to the anterior end of the inner wings of the proötics, which roof the myodome. It is probably not homologons with the bone so named in mammals. Gill has given it the special name of dichost. It is not synonymous with the bone in fishes called basisphenoid by Owen. Starks, Synonymy of the Fish Skeleton, p. 512.
    • ***


Webster's Revised Unabridged Dictionary
Basi-, + sphenoid,


In literature:

It is difficult to avoid injury to the pituitary body embedded in the basisphenoid bone.
"Text Book of Biology, Part 1: Vertebrata" by H. G. Wells
The knoblike antotic processes on the basisphenoid are unlike those of any other known coelacanth.
"A New Genus of Pennsylvania Fish (Crossoperygii, Coelacanthiformes) from Kansas" by Joan Echols
Posterolateral to the parietal and dorsal to the posterior part of the basisphenoid is the prootic.
"A Revision of Snakes of the Genus Conophis (Family Colubridae, from Middle America)" by John Wellman
The basisphenoid has on each side a well marked pterygoidal apophysis.
"Trees. A Woodland Notebook" by Herbert Maxwell
The basisphenoid has on each side a well marked pterygoidal apophysis.
"Extinct Birds" by Walter Rothschild
In front of the basioccipital is the basisphenoid with an alisphenoid on each side.
"Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 3" by Various