| TA | alkaline tuberculin; arterial tension; axillary temperature; tactile afferent; Takayasu arteritis; t... |
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| GnRH | Gonadotropin Releasing Hormone [HP 1898, 2034] = LHRH = Go... |
| MAD | Major Antigenic Determinant |
| MHC | Major Histocompatibility Complex |
| EMM | erythema multiforme major |
| ductus arteriosus, patent | Abnormal persistence of an open lumen in the ductus arteriosus after birth, the direction of flow being from the aorta to the pulmonary artery, resulting in recirculation of arterial blood through the lungs. (12 Dec 1998) |
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| truncus arteriosus | <radiology> Right aortic arch (30-50%), VSD always immediately beneaath common truncal valve, waterfall or hilar comma sign (types II and III) TYPE, I short main pulmonary artery arises from left post-lat aspect, II pulmonary arteries arise separately from left post-lat aspect, III each pulmonary artery arises from lateral aspects, IV pulmonary arteries arise from dorsal aorta (pseudotruncus), probably tetralogy of Fallot with pulmonary atresia (12 Dec 1998) |
| truncus arteriosus communis | <radiology> Right aortic arch (30-50%), VSD always immediately beneaath common truncal valve, waterfall or hilar comma sign (types II and III) TYPE, I short main pulmonary artery arises from left post-lat aspect, II pulmonary arteries arise separately from left post-lat aspect, III each pulmonary artery arises from lateral aspects, IV pulmonary arteries arise from dorsal aorta (pseudotruncus), probably tetralogy of Fallot with pulmonary atresia (12 Dec 1998) |
| truncus arteriosus, persistent | A congenital anomaly resulting from the failure of the aorticopulmonary system to develop and divide the truncus arteriosus into the aorta and the pulmonary trunk. (12 Dec 1998) |
| angulus iridis | The acute angle between the iris and the cornea at the periphery of the anterior chamber of the eye. Synonym: angulus iridocornealis, angle of iris, angulus iridis, filtration angle. (05 Mar 2000) |
| annulus iridis | Either of two zones on the anterior surface of the iris, separated by a circular line concentric with the pupillary border. Synonym: annulus iridis. (05 Mar 2000) |
| annulus iridis minor | The narrow inner zone of the iris. Synonym: annulus iridis minor. (05 Mar 2000) |
| atresia iridis | Congenital absence of the pupillary opening. Synonym: atretopsia. (05 Mar 2000) |
| margo ciliaris iridis | The peripheral border of the iris attached to the ciliary body. Synonym: margo ciliaris iridis, ciliary margin of iris. (05 Mar 2000) |
| margo pupillaris iridis | The inner border of the iris that forms the edge of the pupil. Synonym: margo pupillaris iridis, pupillary margin of iris. (05 Mar 2000) |
| vitiligo iridis | Small white patches in brown irides. (05 Mar 2000) |
| coloboma iridis | Retention of the choroid fissure causing a congenital cleft of the iris, often associated with coloboma of the choroid, viable in the inferior ocular fundus, obsolete term for the iris defect resulting from a large surgical iridectomy. (05 Mar 2000) |
| plicae iridis | Numerous very fine, almost microscopic, radial folds on the posterior surface of the iris that extend around the pupillary margin. Synonym: plicae iridis. (05 Mar 2000) |
| musculus dilator iridis | <anatomy> The radial muscular fibres extending from the sphincter pupillae to the ciliary margin; some anatomists regard them as elastic, not muscular, in humans. Synonym: musculus dilator pupillae, dilator iridis, dilator of pupil, musculus dilator iridis. (05 Mar 2000) |
| heterochromia iridis | A difference of colour between the iris of one eye and the other. (a person with one brown and one blue eye has heterochromia iridis.) also, a difference in colour within an iris (sectoral heterochromia iridis). (12 Dec 1998) |