| A&P | anterior and posterior; assessment and plans; auscultation and percussion |
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| APDER | anterior-posterior dual energy radiography |
| APV | abnormal posterior vector |
| CPC | central posterior curve; cerebellar Purkinje cell; cerebral palsy clinic; cerebral performance categ... |
| EPA | eicosapentaenoic acid; empiric phrase association; Environmental Protection Agency; erect posterior-... |
| Farabeuf's triangle | The triangle formed by the internal jugular and facial veins and the hypoglossal nerve. (05 Mar 2000) |
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| umbilicomammillary triangle | A triangle with its apex at the umbilicus and its base at the line joining the nipples. (05 Mar 2000) |
| Killian's triangle | <anatomy> The triangular-shaped area of the cervical oesophagus bordered by the oblique fibres of the inferior constrictor muscle of the pharynx and the transverse fibres of the cricopharyngeus muscle through which Zenker's diverticulum occurs, and the A-V nodal triangle between the coronary sinus orifice and the ventricular crest. Synonym: laimer triangle. (05 Mar 2000) |
| femoral triangle | A triangular space at the upper part of the thigh, bounded by the sartorius and adductor longus muscles and the inguinal ligament, with a floor formed laterally by the iliopsoas muscle and medially by the pectineus muscle; the branches of the femoral nerve are distributed within the femoral triangle; it is bisected by the femoral vessels, which enter the adductor canal at its apex. Synonym: trigonum femorale, fossa scarpae major, Scarpa's triangle, subinguinal triangle. (05 Mar 2000) |
| Koch's triangle | A triangular area of the wall of the right atrium of the heart, that marks the situation of the atrioventricular node. (05 Mar 2000) |
| urogenital triangle | The anterior portion of the perineal region containing the openings of the urethra and vagina in the female and the urethra and root structures of the penis in the male. Synonym: regio urogenitalis, urogenital region. (05 Mar 2000) |
| Labbe's triangle | An area bounded below by a horizontal line touching the lower edge of the cartilage of the left ninth rib, laterally by the line of the false ribs, and to the right side by the liver; here the stomach is normally in contact with the abdominal wall. (05 Mar 2000) |
| laimer triangle | <anatomy> The triangular-shaped area of the cervical oesophagus bordered by the oblique fibres of the inferior constrictor muscle of the pharynx and the transverse fibres of the cricopharyngeus muscle through which Zenker's diverticulum occurs, and the A-V nodal triangle between the coronary sinus orifice and the ventricular crest. Synonym: laimer triangle. (05 Mar 2000) |
| Langenbeck's triangle | A triangle formed by lines drawn from the anterior superior iliac spine to the surface of the great trochanter and to the surgical neck of the femur; a penetrating wound in this area probably involves the joint. (05 Mar 2000) |
| frontal triangle | A triangle bounded above by the maximum frontal diameter and laterally by lines joining the extremities of this diameter with the glabella. (05 Mar 2000) |
| Lesser's triangle | The space between the bellies of the digastric muscle and the hypoglossal nerve. (05 Mar 2000) |
| Lesshaft's triangle | A triangular space bounded above by the end of the last rib and the serratus posterior inferior muscle, anteriorly by the internal oblique, and posteriorly by the quadratus lumborum; lumbar hernia occurs in this space. Synonym: Lesshaft's triangle. (05 Mar 2000) |
| Lieutaud's triangle | A triangular smooth area at the base of the bladder between the openings of the two ureters and that of the urethra. Synonym: trigonum vesicae, Lieutaud's body, Lieutaud's triangle, Lieutaud's trigone, vesical triangle. (05 Mar 2000) |
| lumbar triangle | An area in the posterior abdominal wall bounded by the edges of the latissimus dorsi and external oblique muscles and the iliac crest; herniations occasionally occur here. Synonym: trigonum lumbale, Petit's lumbar triangle. (05 Mar 2000) |
| lumbocostoabdominal triangle | An irregular area bounded by the serratus posterior inferior, obliquus externus, obliquus internus, and erector spinae muscles. (05 Mar 2000) |