| frontal border of sphenoid bone | The margin of the greater wing of the sphenoid bon that articulates with the frontal bone. Synonym: margo frontalis ossis sphenoidalis. (05 Mar 2000) |
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| lesser wing of sphenoid bone | One of a bilateral pair of triangular, pointed plates extending laterally from the anterolateral body of the sphenoid bone. Forming the posteriormost portion of the floor of the anterior cranial fossa, their sharp posterior edge forms the sphenoidal ridge separating anterior and middle cranial fossae. The medial end of the lesser wing attaches to the body by means of two pedicles, thus forming the optic canal. The wing itself forms the superior margin of the supraorbital fissure. Synonym: ala minor ossis sphenoidalis, ala orbitalis, Ingrassia's apophysis, Ingrassia's wing. (05 Mar 2000) |
| lateral malleolar surface of talus | That surface of the trochlea of the talus that articulates with the lateral malleolus of the fibula. Synonym: facies malleolaris lateralis tali. (05 Mar 2000) |
| lateral surface | The surface of a part of the body that faces away from the midline. The NA recognises a lateral surface on the following structures: fibula; ovary; radius; testis; tibia; zygomatic bone. Synonym: facies lateralis. (05 Mar 2000) |
| lateral surface of arm | The lateral surface of the arm. Synonym: facies lateralis brachii. (05 Mar 2000) |
| lateral surface of fibula | The lateral surface of the fibula. Synonym: facies lateralis fibulae. (05 Mar 2000) |
| lateral surface of finger | The lateral surface of a finger. Synonym: facies lateralis digiti manus. (05 Mar 2000) |
| lateral surface of leg | The lateral surface of the part of the inferior limb between the knee and the ankle. Synonym: facies lateralis cruris. (05 Mar 2000) |
| lateral surface of lower limb | The lateral surface of the inferior limb. Synonym: facies lateralis membri inferioris. (05 Mar 2000) |
| lateral surface of ovary | The surface of the ovary facing the pelvic wall. Synonym: facies lateralis ovarii. (05 Mar 2000) |
| lateral surface of testis | The laterally directed surface of the testis. Synonym: facies lateralis testis. (05 Mar 2000) |
| lateral surface of tibia | The laterally directed surface of the tibia. Synonym: facies lateralis tibiae. (05 Mar 2000) |
| lateral surface of toe | The lateral surface of a toe. Synonym: facies lateralis digiti pedis. (05 Mar 2000) |
| sphenoid | 1. Wedge-shaped; as, a sphenoid crystal. 2. <anatomy> Of or pertaining to the sphenoid bone. <anatomy> Sphenoid bone, an irregularly shaped bone in front of the occipital in the base of the skull of the higher vertebrates. It is composed of several foetal bones which become united the adult. See Alisphenoid, Basisphenoid, Orbitosphenoid, Presphenoid. Origin: Gr.; a wedge + form: cf. F. Sphenoide. 1. <chemistry> A wedge-shaped crystal bounded by four equal isosceles triangles. It is the hemihedral form of a square pyramid. 2. <anatomy> The sphenoid bone. Source: Websters Dictionary (01 Mar 1998) |
| sphenoid crest | A vertical ridge in the midline of the anterior surface of the sphenoid bone that articulates with the perpendicular plate of the ethmoid bone. Synonym: crista sphenoidalis. (05 Mar 2000) |