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a.1.(Anat.) Of or pertaining to the sphenoid bone and the orbit, or to the orbitosphenoid bone.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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Sphenoid bone is mainly ossified from pre- and post-sphenoid centers with some contribution from alisphenoid and orbitosphenoid centers.
In the orbitotemporal region of chondrocranium, the orbitosphenoid is observed (Table 1).
Two other features may be interpreted as synapomorphies of this clade if a 'fast optimization' is chosen: rostrodermethmoids ossified and not fused with median supraethmoid (29: 0 [right arrow] 1) and orbitosphenoid not present as independent ossification (44: 0 [right arrow] 1).
Sphenoid bone has a body formed by pre sphenoid and post sphenoid centers along with medial crus of orbitosphenoid. The lesser and greater wings develop from orbito-sphenoids and ali-sphenoids respectively.