Webster
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Webster’s Revised Unabridged Dictionary · 1913

Sphenoid

Sphe′noid (sfē′noid), a. [Gr. ???; σφήν a wedge + εἶδος form: cf. F. sphénoïde.] 1. Wedge-shaped; as, a sphenoid crystal.

2. (Anat.) Of or pertaining to the sphenoid bone.

Sphenoid bone (Anat.), an irregularly shaped bone in front of the occipital in the base of the skull of the higher vertebrates. It is composed of several fetal bones which become united the adult. See Alisphenoid, Basisphenoid, Orbitosphenoid, Presphenoid.

Sphe′noid, n. 1. (Crystallog.) A wedge-shaped crystal bounded by four equal isosceles triangles. It is the hemihedral form of a square pyramid.

2. (Anat.) The sphenoid bone.

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek, which our source spelled in Latin letters, set in Greek letters; entries of one spelling merged into one article; Greek words our source left out (shown as “?”), read from the 1898 printing, from the same plates (the Library of Congress’s copy), where the place could be found with certainty.