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sphenoid bone

British  

noun

  1. the large butterfly-shaped compound bone at the base of the skull, containing a protective depression for the pituitary gland

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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The middle fossa extends from the lesser wing of the sphenoid bone anteriorly to the petrous ridge posteriorly.

From Textbooks • Jun. 19, 2013

The lesser wings of the sphenoid bone form the prominent ledge that marks the boundary between the anterior and middle cranial fossae.

From Textbooks • Jun. 19, 2013

At the intersection of four bones is the pterion, a small, capital-H-shaped suture line region that unites the frontal bone, parietal bone, squamous portion of the temporal bone, and greater wing of the sphenoid bone.

From Textbooks • Jun. 19, 2013

Figure 16.8 Pituitary Tumor The pituitary gland is located in the sella turcica of the sphenoid bone within the cranial floor, placing it immediately inferior to the optic chiasm.

From Textbooks • Jun. 19, 2013

Presently the two students returned, looking just a little shame-faced, and plunged instantly into wild talk about the weather, the town, and the University—anything and everything except the sphenoid bone.

From The Firm of Girdlestone by Doyle, Arthur Conan, Sir

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