| 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) |
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| tongue bone | <anatomy> A U-shaped bone lying between the mandible and the larynx, suspended from the styloid processes by slender stylohyoid ligaments. See: hyoid apparatus. Synonym: os hyoideum, lingual bone, tongue bone. (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) |
| sphenoid process | The posterior and smaller of the two processes at the extremity of the vertical plate of the palatine bone; processus sphenoidalis cartilaginis septi nasi, processus posterior cartilaginis septi nasi. Synonym: processus sphenoidalis, sphenoid process. (05 Mar 2000) |
| sphenoid process of septal cartilage | The tapering extension of the septal cartilage that lies between the perpendicular plate of the ethmoid and the vomer. Synonym: processus posterior cartilaginis septi nasi, processus sphenoidalis cartilaginis septi nasi, sphenoid process of septal cartilage. (05 Mar 2000) |
| sphenoid sinus | One of the paired paranasal sinuses, located in the body of the sphenoid bone and communicating with the highest meatus of the nasal cavity on the same side. (12 Dec 1998) |
| sphenoid sinusitis | Inflammation of the sphenoid sinus. This condition usually is accompanied by pansinusitis and may present itself in an acute or chronic form. (12 Dec 1998) |
| bone within a bone | <radiology> STOP heavy metal, S: sickle cell disease, T: Thorotrast, O: osteopetrosis, P: Paget's disease, heavy metals, hypervitaminosis D (12 Dec 1998) |
| adder's-tongue | <botany> A genus of ferns (Ophioglossum), whose seeds are produced on a spike resembling a serpent's tongue. The yellow dogtooth violet. Source: Websters Dictionary (01 Mar 1998) |
| anti-black-tongue factor | A precursor of NAD, that is a product of the oxidation of nicotine. (18 Nov 1997) |
| baked tongue | The dry blackish tongue noted when patients with typhoid fever or other disorders are allowed to become dehydrated. (05 Mar 2000) |
| bald tongue | An erythematous, edematous, and painful tongue which appears smooth due to loss of the filiform and sometimes the fungiform papillae secondary to certain nutritional deficiencies, especially B-vitamin deficencies, as seen in pellagra, thiamin deficiency, and disorders such as pernicious anaemia (Hunter's or Moeller's glossitis). Synonym: bald tongue. (05 Mar 2000) |
| base of tongue | The posterior attached portion of the tongue. Synonym: radix linguae, base of tongue. (05 Mar 2000) |
| beet-tongue | Sometimes used of the tongue in pellagra, where intense erythema appears, first at the tip, then along the edges, and finally over the dorsum; there may be pain and increased elevation; the shiny appearance results from oedema, not atrophy, except in chronic pellagra. (05 Mar 2000) |