Bone, sphenoid

Bone, sphenoid
A bone at the base of the skull that is of a most irregular shape. The sphenoid bone consists of a central portion, (the body of the sphenoid) and six processes: two greater wings, two lesser wings and two pterygoid processes. The sphenoid bone articulates (joins) with a number of other bones (the occipital, frontal, ethmoid, and vomer, and with the paired temporal, parietal, zygomatic, palatine and sphenoidal concha bones).

Medical dictionary. 2011.

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  • Bone — is the substance that forms the skeleton of the body. It is composed chiefly of calcium phosphate and calcium carbonate. It also serves as a storage area for calcium, playing a large role in calcium balance in the blood. The 206 bones in the body …   Medical dictionary

  • Sphenoid bone — Sphenoid Sphe noid, a. [Gr. ???; sfh n a wedge + e i^dos form: cf. F. sph[ e]no[ i]de.] 1. Wedge shaped; as, a sphenoid crystal. [1913 Webster] 2. (Anat.) Of or pertaining to the sphenoid bone. [1913 Webster] {Sphenoid bone} (Anat.), an… …   The Collaborative International Dictionary of English

  • Sphenoid — Sphe noid, a. [Gr. ???; sfh n a wedge + e i^dos form: cf. F. sph[ e]no[ i]de.] 1. Wedge shaped; as, a sphenoid crystal. [1913 Webster] 2. (Anat.) Of or pertaining to the sphenoid bone. [1913 Webster] {Sphenoid bone} (Anat.), an irregularly shaped …   The Collaborative International Dictionary of English

  • sphenoid sinus — or sphenoidal sinus n either of two irregular cavities in the body of the sphenoid bone that communicate with the nasal cavities * * * sphenoidal sinus, sinus sphenoidalis [TA] one of the paired paranasal sinuses in the anterior part of the body… …   Medical dictionary

  • Sphenoid — Sphe noid, n. 1. (Crystallog.) A wedge shaped crystal bounded by four equal isosceles triangles. It is the hemihedral form of a square pyramid. [1913 Webster] 2. (Anat.) The sphenoid bone. [1913 Webster] …   The Collaborative International Dictionary of English

  • sphenoid — [sfē′noid΄] adj. [ModL sphenoides < Gr sphēnoeides: see SPHENE & OID] 1. wedge shaped 2. Anat. designating or of the wedge shaped compound bones of the skull: see SKULL: Also sphenoidal n. 1. the sphenoid bone …   English World dictionary

  • Frontal bone — Bone: Frontal bone Frontal bone highlighted in red Latin os frontale Gray s …   Wikipedia

  • Bone — This article is about the skeletal organ. For other uses, see Bone (disambiguation) and Bones (disambiguation). For the tissue, see Osseous tissue. Drawing of a human femur Bones are rigid organs that constitute part of the endoskeleton of… …   Wikipedia

  • Ethmoid bone — Bone: Ethmoid bone Cranial bones …   Wikipedia

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