basisphenoid bone

basisphenoid bone
a bone in the floor of the cranium of embryos of many different animal species. In humans, before birth it becomes part of the postsphenoidal part of the sphenoid bone (see under part); in most other animals it persists as a separate bone between the basioccipital bone and the presphenoidal bone.

Medical dictionary. 2011.

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  • Basisphenoid — Ba si*sphe noid, n. (Anat.) The basisphenoid bone. [1913 Webster] …   The Collaborative International Dictionary of English

  • basisphenoid — Relating to the base or body of the sphenoid bone; denoting the independent center of ossification in the embryo that forms the posterior portion of the body of the sphenoid bone. * * * …   Medical dictionary

  • basisphenoid — 1. adjective Of or pertaining to the base of the sphenoid bone, especially to a centre of ossification there in the embryo 2. noun The basisphenoid bone …   Wiktionary

  • 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 — Bone: Sphenoid bone Cranial Bones. Only the end of the wing of the sphenoid bone is visible …   Wikipedia

  • basisphenoid — the small, Y shaped, deep, endochondral cranial bone ventrally covered by the parasphenoid and medial to the pterosphenoids forming part of the floor of the neurocranium and the base of the posterior myodome. The bone ossifies from the medial… …   Dictionary of ichthyology

  • Presphenoid bone — Presphenoid Pre*sphe noid, a. (Anat.) Situated in front of the sphenoid bone; of or pertaining to the anterior part of the sphenoid bone (i. e., the presphenoid bone). [1913 Webster] {Presphenoid bone} (Anat.), the anterior part of the body of… …   The Collaborative International Dictionary of English

  • 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

  • postsphenoid part of sphenoid bone — postsphenoidal part of sphenoid bone the posterior portion of the sphenoid bone; in the fetus it consists of separate basisphenoid, pterygoid, and alisphenoid parts, first cartilaginous and later bony, which fuse to each other and to the… …   Medical dictionary

  • basiotic bone — a small bone of the fetus between the basisphenoid and the basioccipital bones; called also Albrecht b …   Medical dictionary

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