| macrophage-1 antigen | An adhesion-promoting leukocyte surface membrane heterodimer. The alpha subunit consists of the CD11b antigen and the beta subunit of the CD18 antigen (antigens, CD18). The antigen, which is an integrin, functions both as a receptor for complement 3 and in cell-cell and cell-substrate adhesive interactions. (12 Dec 1998) |
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| macrophage-activating factor | An agent that stimulates macrophages to attack and ingest cancer cells. They are secreted by stimulated lymphocytes that prime macrophages to become non-specifically cytotoxic to tumours. They also modulate the expression of macrophage cell surface ia antigens. One maf is interferon-gamma (interferon type II). Other factors antigenically distinct from ifn-gamma have also been identified. (12 Dec 1998) |
| macrophages, alveolar | Round, granular, mononuclear phagocytes found in the alveoli of the lungs. They ingest small inhaled particles resulting in degradation and presentation of the antigen to immunocompetent cells. (12 Dec 1998) |
| macrophages, peritoneal | Mononuclear phagocytes derived from bone marrow precursors but resident in the peritoneum. (12 Dec 1998) |
| macrophagocyte | Relatively long lived phagocytic cell of mammalian tissues, derived from blood monocyte. Macrophages from different sites have distinctly different properties. Main types are peritoneal and alveolar macrophages, tissue macrophages (histiocytes), Kupffer cells of the liver and osteoclasts. In response to foreign materials may become stimulated or activated. Macrophages play an important role in killing of some bacteria, protozoa and tumour cells, release substances that stimulate other cells of the immune system and are involved in antigen presentation. May further differentiate within chronic inflammatory lesions to epithelioid cells or may fuse to form foreign body giant cells or Langhans giant cells. (18 Nov 1997) |
| macrophallus | Synonym: macropenis. Origin: macro-+ G. Phallos, penis (05 Mar 2000) |
| macrophthalmia | Congenital large globe. Synonym: macrophthalmia, megophthalmus. Origin: megalo-+ G. Ophthalmos, eye (05 Mar 2000) |
| macrophyllous | <botany> Having long or large leaves. Origin: Macro- + Gr. A leaf. Source: Websters Dictionary (01 Mar 1998) |
| macrophyte | <botany> A member of the macroscopic plant life of an area, especially of a body of water, large aquatic plant, the term aquatic macrophyte has no taxonomic significance. (09 Oct 1997) |
| macropinacoid | <chemistry> One of the two planes of an orthorhombic crystal which are parallel to the vertical and longer lateral (macrodiagonal) axes. Origin: Macro- + pinacoid. Source: Websters Dictionary (01 Mar 1998) |
| macropod | <marine biology> Any one of a group of maioid crabs remarkable for the length of their legs. Synonym: spider crab. Origin: Macro- + -pod. Source: Websters Dictionary (01 Mar 1998) |
| macropodia | Abnormally large feet. Synonym: megalopodia, pes gigas. Origin: macro-+ G. Pous, foot. (05 Mar 2000) |
| macropodous | <zoology> Having long legs or feet. Source: Websters Dictionary (01 Mar 1998) |
| macropolycyte | An unusually large polymorphonuclear neutrophilic leukocyte that contains a multisegmented nucleus (e.g., 8, 10, or more lobes); the arrangement of chromatin is less compact than in the normal neutrophil, and the cytoplasmic granules tend to be larger and more acidophilic. Such changes frequently precede significant alterations in the red blood cells, e.g., as in pernicious anaemia and certain other forms of anaemia. Origin: macro-+ G. Polys, many, + kytos, cell (05 Mar 2000) |
| macroprism | <chemistry> A prism of an orthorhombic crystal between the macropinacoid and the unit prism; the corresponding pyramids are called macropyramids. Origin: Macro- + prism. Source: Websters Dictionary (01 Mar 1998) |
| macula |
a spot larger than a puncture, of an indeterminate figure, and of a different color from the general surface.
출처: www.biology.lsu.edu/heydrjay/ThomasSay/terms.html
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| macula |
A small area of the retina where vision is the keenest. The macula is located in the center of the retina and provides central vision. Activities that require central vision include driving, reading and other activities that require sharp, straight-ahead vision.
출처: www.nutrabio.com/Definitions/definitions_m.htm
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| macrocytic anemia |
Low red blood cell count, characterized by the presence in the blood of larger than normal red blood cells.
출처: www.nutrabio.com/Definitions/definitions_m.htm
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| macroadenoma |
Pituitary adenomas may be micro or macro. Microadenomas appear as small nodules in the normal sized pituitary, whereas, macroadenomas enlarge the pituitary.
출처: virtualtrials.com/dictionary.cfm
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| macroprolactinoma |
A prolactinoma more than 10 mm in diameter and and usually associated with serum prolactin levels exceeding 100 ng per milliliter.
출처: virtualtrials.com/dictionary.cfm
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| MAC | a coarse lace |
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| MAC | make knotted patterns |
| MAC | having a large brain case |
| MAC | having a large brain case |
| MAC | an abnormally large braincase |
| MAC | a single computer instruction that results in a series of instructions in machine language |
| MAC | (combining form) very large in scale or scope or capability |
| MAC | a single computer instruction that results in a series of instructions in machine language |
| MAC | of or relating to the theory or practice of macrobiotics |
| MAC | a diet consisting chiefly of beans and whole grains |
| MAC | the theory of promoting health and longevity by means of diet (especially whole beans and grains) |
| MAC | having an exceptionally large head and brain |