extensor pollicis brevis |
<anatomy, muscle> Origin, dorsal surface of radius; insertion, base of proximal phalanx of thumb; action, extends and abducts the thumb; nerve supply, radial. Synonym: musculus extensor pollicis brevis, musculus extensor brevis pollicis, short extensor muscle of thumb. (05 Mar 2000) |
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extensor pollicis longus |
<anatomy, muscle> Origin, posterior surface of ulna; insertion, base of distal phalanx of thumb; action, extends distal phalanx of thumb; nerve supply, radial. Synonym: musculus extensor pollicis longus, long extensor muscle of thumb, musculus extensor longus pollicis. (05 Mar 2000) |
extensor retinaculum |
A strong fibrous band formed as a thickening of the antebrachial deep fascia, stretching obliquely across the back of the wrist, attaching deeply to ridges on the dorsal aspect of the radius, triquetral and pisiform bones, binding down the extensor tendons of the fingers and thumb. Synonym: retinaculum extensorum, dorsal carpal ligament, ligamentum carpi dorsale. (05 Mar 2000) |
exterior |
1. External; outward; pertaining to that which is external; opposed to interior; as, the exterior part of a sphere. "Sith nor the exterior nor the inward man Resemble that it was." (Shak) 2. External; on the outside; without the limits of; extrinsic; as, an object exterior to a man, opposed to what is within, or in his mind. "Without exterior help sustained." (Milton) 3. Relating to foreign nations; foreign; as, the exterior relations of a state or kingdom. <geometry> Exterior angle, the side of the polygon upon which a front of fortification is formed. Origin: L. Exterior, compar. Of exter or exterus on the outside, outward, foreign, strange, a compar. Fr. Ex: cf. F. Exterieur. See Ex, and cf. Extreme, Interior. Source: Websters Dictionary (01 Mar 1998) |
exteriorise |
1. To direct a patient's interests, thoughts, or feelings into a channel leading outside the self, to some definite aim or object. 2. To expose an organ temporarily for observation, or permanently for purposes of physiologic experiment, e.g., fixation of a segment of bowel with blood supply intact to the outer aspect of the abdominal wall. (05 Mar 2000) |
exterminate |
1. To drive out or away; to expel. "They deposed, exterminated, and deprived him of communion." (Barrow) 2. To destroy utterly; to cut off; to extirpate; to annihilate; to root out; as, to exterminate a colony, a tribe, or a nation; to exterminate error or vice. "To explode and exterminate rank atheism." (Bentley) 3. <mathematics> To eliminate, as unknown quantities. Origin: L. Exterminatus, p. P. Of exterminare to abolish, destroy, drive out or away; ex out + terminus boundary, limit. See Term. Source: Websters Dictionary (01 Mar 1998) |
extermination |
1. The act of exterminating; total destruction; eradication; excision; as, the extermination of inhabitants or tribes, of error or vice, or of weeds from a field. 2. <mathematics> Elimination. Origin: Cf. F. Extermination. Source: Websters Dictionary (01 Mar 1998) |
extern |
An advanced student or recent graduate who assists in the medical or surgical care of hospital patients; formerly, one who lived outside of the institution. Origin: F. Externe, outside, a day scholar (05 Mar 2000) |
external |
<anatomy> Situated or occurring on the outside, many anatomical structures formerly called external are now more correctly termed lateral. Origin: L. Externus = outside (18 Nov 1997) |
external absorption |
The absorption of substances through skin, mucocutaneous surfaces, or mucous membranes. (05 Mar 2000) |
external acoustic foramen |
The orifice of the external acoustic meatus in the tympanic portion of the temporal bone. Synonym: porus acusticus externus, external acoustic foramen, external acoustic pore, external auditory pore, external auditory foramen, orifice of external acoustic meatus. (05 Mar 2000) |
external acoustic meatus |
The passage leading inward through the tympanic portion of the temporal bone, from the auricle to the tympanic membrane; it consists of a bony (inner) portion and a fibrocartilaginous (outer) portion, the cartilaginous external acoustic meatus. Synonym: meatus acusticus externus, acoustic meatus, antrum auris, auditory canal, external auditory meatus. (05 Mar 2000) |
external acoustic pore |
The orifice of the external acoustic meatus in the tympanic portion of the temporal bone. Synonym: porus acusticus externus, external acoustic foramen, external acoustic pore, external auditory pore, external auditory foramen, orifice of external acoustic meatus. (05 Mar 2000) |
external anal sphincter |
A fusiform ring of striated muscular fibres surrounding the anus, attached posteriorly to the coccyx and anteriorly to the central tendon of the perineum; it is subdivided, often indistinctly, into a subcutaneous part, a superficial part and a deep part for descriptive purposes. Synonym: musculus sphincter ani externus, external sphincter muscle of anus. (05 Mar 2000) |
external aperture of cochlear canaliculus |
The external opening of the cochlear aqueduct on the temporal bone medial to the jugular fossa. Synonym: apertura externa canaliculi cochleae. (05 Mar 2000) |