| Mackenzie, Richard | <person> Scottish surgeon, 1821-1854. See: Mackenzie's amputation. (05 Mar 2000) |
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| Mackenzie, Sir James | <person> Scottish physician practicing in London, 1853-1925. See: Mackenzie's polygraph. (05 Mar 2000) |
| mackerel | <zoology> Any species of the genus Scomber, and of several related genera. They are finely formed and very active oceanic fishes. most of them are highly prized for food. The common mackerel (Scomber scombrus), which inhabits both sides of the North Atlantic, is one of the most important food fishes. It is mottled with green and blue. The Spanish mackerel (Scomberomorus maculatus), of the American coast, is covered with bright yellow circular spots. Bull mackerel, Chub mackerel. The porbeagle. Mackerel sky, or Mackerel-back sky, a sky flecked with small white clouds; a cirro-cumulus. See Cloud. "Mackerel sky and mare's-tails Make tall ships carry low sails." (Old Rhyme) Origin: OF. Maquerel, F. Maquereau (LL. Macarellus), prob. For maclereau, fr. L. Macula a spot, in allusion to the markings on the fish. See Mail armor. Source: Websters Dictionary (01 Mar 1998) |
| MacLachlan, Elsie | <person> 20th century researcher. See: Lowe-Terrey-MacLachlan syndrome. (05 Mar 2000) |
| Maclagan's test | Precipitation of abnormal proportions of albumin and globulin from the serum of patients with liver disease by addition of thymol. Although popular in the past it has been superseded by quantitative determination of specific proteins and direct measurement of liver enzymes. Synonym: Maclagan's test, Maclagan's thymol turbidity test. (05 Mar 2000) |
| Maclagan's thymol turbidity test | Precipitation of abnormal proportions of albumin and globulin from the serum of patients with liver disease by addition of thymol. Although popular in the past it has been superseded by quantitative determination of specific proteins and direct measurement of liver enzymes. Synonym: Maclagan's test, Maclagan's thymol turbidity test. (05 Mar 2000) |
| macle | <chemical> Chiastolite; so called from the tessellated appearance of a cross-section. See Chiastolite. A crystal having a similar tessellated appearance. A twin crystal. Origin: L. Macula a spot: cf. F. Macle. Cf. Mackle, Mascle. Source: Websters Dictionary (01 Mar 1998) |
| macled | 1. <chemical> Marked like macle (chiastolite). Having a twin structure. See Twin. 2. See Mascled. Source: Websters Dictionary (01 Mar 1998) |
| Macleod's rheumatism | Rheumatoid arthritis with abundant serous effusion in the affected joints. (05 Mar 2000) |
| Macleod's syndrome | A state in which the roentgenographic density of one lung (or one lobe) is markedly less than the density of the other(s) because of the presence of air trapped during expiration. Synonym: Macleod's syndrome, Swyer-James syndrome. (05 Mar 2000) |
| Macleod, Roderick | <person> Scottish physician, 1795-1852. See: Macleod's rheumatism. (05 Mar 2000) |
| Macleod, William Mathieson | <person> British physician, 1911-1977. See: Macleod's syndrome, Swyer-James-MacLeod syndrome. (05 Mar 2000) |
| maclurea | <paleontology> A genus of spiral gastropod shells, often of large size, characteristic of the lower Silurian rocks. Origin: NL. Named from William Maclure, the geologist. Source: Websters Dictionary (01 Mar 1998) |
| maclurin | <chemistry> See Morintannic. Source: Websters Dictionary (01 Mar 1998) |
| MacNeal's tetrachrome blood stain | <technique> A stain for blood smears comprised of a mixture of methylene blue, azure A, methylene violet, and eosin Y. (05 Mar 2000) |