| AMA | against medical advice; alkaline membrane assay; American Management Association; American Medical A... |
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| AMB | avian myeloblastosis; amphotericin B; anomalous muscle bundle |
| AMC | academic medical center; acetylmethyl carbinol; Animal Medical Center; antibody-mediated cytotoxicit... |
| AMR | acoustic muscle reflex; activity metabolic rate; acute mitral stenosis; alopecia-mental retardation ... |
| ASMA | antismooth muscle antibody |
| Treitz's arch | A sickle-shaped fold of peritoneum sometimes found arching between the left side of the duodenojejunal flexure and the medial border of the left kidney; its right free edge contains the ascending branch of the left colic artery and inferior mesenteric vein; forms anterior boundary of the paraduodenal recess. See: paraduodenal recess. Synonym: plica paraduodenalis, Treitz's arch. (05 Mar 2000) |
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| jugular venous arch | A connecting vein between the two anterior jugular veins in the suprasternal space. Synonym: arcus venosus juguli. (05 Mar 2000) |
| expansion arch | An orthodontic appliance that moves the dental structures distally, bucally, or labially, creating increased molar to molar width and arch length. (05 Mar 2000) |
| fallopian arch | <anatomy> A fibrous band formed by the thickened inferior border of the aponeurosis of the external oblique that extends from the anterior superior spine of the ilium to the pubic tubercle bridging, muscular and vascular lacunae;forms the floor of the inguinal canal; gives origin to the lowermost fibres of internal oblique and transversus abdominis muscles. See: aponeurosis of external abdominal oblique muscle. Synonym: ligamentum inguinale, arcus inguinalis, crural arch, fallopian arch, fallopian ligament, femoral arch, Poupart's ligament. (05 Mar 2000) |
| femoral arch | <anatomy> A fibrous band formed by the thickened inferior border of the aponeurosis of the external oblique that extends from the anterior superior spine of the ilium to the pubic tubercle bridging, muscular and vascular lacunae;forms the floor of the inguinal canal; gives origin to the lowermost fibres of internal oblique and transversus abdominis muscles. See: aponeurosis of external abdominal oblique muscle. Synonym: ligamentum inguinale, arcus inguinalis, crural arch, fallopian arch, fallopian ligament, femoral arch, Poupart's ligament. (05 Mar 2000) |
| zygomatic arch | The arch formed by the temporal process of the zygomatic bone that joins the zygomatic process of the temporal bone. Synonym: arcus zygomaticus, cheek bone, malar arch, zygoma. (05 Mar 2000) |
| first arch syndrome | <syndrome> Generic term including syndrome's of malformations involving derivatives of the first branchial arch, with or without associated malformations; includes mandibulofacial dysostosis, micrognathia with peromelia, otomandibular dystosis, acrofacial dysostosis, and others. (05 Mar 2000) |
| labial arch | An orthodontic arch wire that approximates the labial surfaces of the teeth. (05 Mar 2000) |
| lamina of vertebral arch | The flattened posterior portion of the vertebral arch extending between the pedicles and the midline, forming the dorsal wall of the vertebral foramen, and from the midline junction of which the spinous process extends. Synonym: lamina arcus vertebrae, neurapophysis. (05 Mar 2000) |
| Langer's arch | pectorodorsalis muscle |
| lateral longitudinal arch of foot | Formed by calcaneus, cuboid and two lateral metatarsals; the combined arch is supported normally by ligaments, intrinsic muscles, and the tendons of extrinsic muscles of the foot. Synonym: arcus pedis longitudinalis pars lateralis. (05 Mar 2000) |
| lateral lumbocostal arch | <anatomy> One of Haller's arches; a thickening of the fascia of the quadratus lumborum muscle between the transverse process of the first lumbar vertebra and the twelfth rib on either side that gives attachment to a portion of the diaphragm. Synonym: ligamentum arcuatum laterale, arcus lumbocostalis lateralis, lateral lumbocostal arch. (05 Mar 2000) |
| lingual arch | <dentistry> An orthodontic wire attached from molar to molar in the inside of your teeth. (08 Jan 1998) |
| longitudinal arch of foot | See: medial longitudinal arch of foot, lateral longitudinal arch of foot. Synonym: arcus pedis longitudinalis, lateral part of longitudinal arch of foot. (05 Mar 2000) |
| lymph node of azygos arch | A lymph node of the posterior mediastinal group located adjacent to the arch of the azygos vein. Synonym: nodus lymphaticus arcus venae azygos. (05 Mar 2000) |