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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

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The greater wings of the sphenoid bone extend laterally to either side away from the sella turcica, where they form the anterior floor of the middle cranial fossa.

From Textbooks Jun. 19, 2013

The pituitary, seated in the sella turcica of the sphenoid bone, is directly inferior to the optic chiasm.

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

It extends from the frontal bone anteriorly to the lesser wing of the sphenoid bone posteriorly.

From Textbooks Jun. 19, 2013

The sphenoid bone as it extends up touches the base of the front lobe and of the Ideal region, where it assumes the name of Somnolence.

From Buchanan's Journal of Man, April 1887 Volume 1, Number 3 by Buchanan, Joseph R. (Joseph Rodes)

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