| AM | Academic Medicine [journal]; actomyosin; acute myelofibrosis; adult male; adult monocyte; aerospace ... |
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| am | ametropia; amyl; amplitude; before noon [Lat. ante meridiem]; meter angle; myopic astigmatism |
| AsM | astigmatism, myopic |
| M+Am | compound myopic astigmatism |
| articular crescent | A crescent-shaped intra-articular fibrocartilage found in certain joints. Synonym: meniscus articularis, articular crescent, intra-articular cartilage. (05 Mar 2000) |
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| malarial crescent | The male or female gametocyte(s) of Plasmodium falciparum, whose presence in human red blood cells is diagnostic of falciparum malaria. Synonym: crescent, sickle form. Myopic crescent, a white or grayish white crescentic area in the fundus of the eye located on the temporal side of the optic disk; caused by atrophy of the choroid, permitting the sclera to become visible. Synonym: myopic conus. Sublingual crescent, the crescent-shaped area on the floor of the mouth formed by the lingual wall of the mandible and the adjacent part of the floor of the mouth. (05 Mar 2000) |
| glomerular crescent | Proliferated epithelial cells partly encircling a renal glomerulus; it occurs in glomerulonephritis. (05 Mar 2000) |
| grey crescent | <biology> A region near the equator of the surface in the fertilized egg of various amphibia, often of greyish colour, that appears to contain special morphogenetic properties. (18 Nov 1997) |
| compound myopic astigmatism | Astigmatism in which all meridians are myopic but to different degrees. (05 Mar 2000) |
| myopic | Relating to or suffering from myopia. (05 Mar 2000) |
| myopic astigmatism | That form of astigmatism in which one meridian is myopic and the one at right angle to it is without refractive error. Synonym: simple myopic astigmatism. (05 Mar 2000) |
| myopic choroidopathy | Chronic degeneration of the sclera and choroid with posterior staphyloma, accompanying high myopia. (05 Mar 2000) |
| myopic conus | myopic crescent |
| myopic degeneration | Association of crescent of the optic disk, atrophy of the choroid and macular pigment, subretinal neovascularization, haemorrhage, and pigment proliferation in pathologic myopia. (05 Mar 2000) |
| crescent | 1. Any figure of the shape of the moon in its first quarter. 2. The figure made by the gray columns or cornua on cross-section of the spinal cord. Synonym: malarial crescent. Origin: L. Cresco, pp. Cretus, to grow (05 Mar 2000) |
| crescent cell | <haematology, pathology> An erythrocyte that changes from the normal discoid shape to a sickled shape when the oxygen tension is low. The pesence of these cells indicates that the patient is homozygotes for the allele that codes for haemoglobin S and that the patient has sickle cell anaemia. (18 Nov 1997) |
| crescent cell anaemia | <haematology> Disease common in races of people from areas in which malaria is endemic. The cause is a point mutation in the allele that codes for the beta chain of haemoglobin with a substitution of (valine for glutamic acid at position 6. The defective haemoglobin (HbS) crystallizes readily at low oxygen tension. In consequence, erythrocytes from homozygotes change from the normal discoid shape to a sickled shape when the oxygen tension is low and these sickled cells become trapped in capillaries or damaged in transit, leading to severe anaemia. In heterozygotes, the disadvantages of the abnormal haemoglobin are apparently outweighed by increased resistance to Plasmodium falciparum malaria, probably because parasitised cells tend to sickle and are then removed from circulation. Symptoms include joint pain, acute abdominal pain, and ulcerations of the lower extremities. Origin: Gr. Haima = blood (18 Nov 1997) |
| simple myopic astigmatism | That form of astigmatism in which one meridian is myopic and the one at right angle to it is without refractive error. Synonym: simple myopic astigmatism. (05 Mar 2000) |
| myopic crescent |
a crescentic posterior staphyloma in the fundus of the eye in myopia.
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