| macro- | <prefix> Prefix from the Greek makros meaning large or long. The opposite of micro-. (12 Dec 1998) |
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| macro-Kjeldahl method | A procedure for analyzing the content of nitrogenous compounds in urine, serum, or other specimens, usually to determine relatively large amounts of nitrogen (e.g., 20 to 100 mg); the specimen is treated with a digestion mixture (copper sulfate and sulfuric acid), heated thoroughly, and made alkaline with a solution of sodium hydroxide; ammonia is then distilled from the mixture, trapped in a boric acid-indicator solution, and titrated with standard hydrochloric or sulfuric acid. (05 Mar 2000) |
| macroadenoma | <tumour> A pituitary adenoma larger than 10 mm in diameter. (05 Mar 2000) |
| macroaggregated albumin | A conglomerate of human serum albumin in a suspension; usually refers to particles 10 to 50 um in size; used as a tagged agent for lung scanning. (05 Mar 2000) |
| macroalgae | Multicellular algae (green, blue-green and red algae) having filamentous, sheet or mat-like morphology. (09 Oct 1997) |
| macroamylasaemia | A form of hyperamylasaemia, in which a portion of serum amylase exists as macroamylase. Origin: macroamylase + G. Haima, blood (05 Mar 2000) |
| macroamylase | <enzyme> Abnormally large serum amylase bound to globulin; causes macroamylasaemia Registry number: EC 3.2.1.- (26 Jun 1999) |
| macrobacterium | A bacterium of unusually large size. Synonym: macrobacterium. (05 Mar 2000) |
| macrobenthos | Organisms (for example, insect larvae) living in or on aquatic substrates and large enough to be seen with the naked eye. (09 Oct 1997) |
| macrobiosis | Synonym: longevity. Origin: macro-+ G. Bios, life (05 Mar 2000) |
| macrobiota | The living organisms (or flora and fauna) of a region that are large enough to be seen with the naked eye. From the greek macro-, large + bios, life. (12 Dec 1998) |
| macrobiote | An organism that is long-lived. Origin: macro-+ G. Bios, life (05 Mar 2000) |
| macrobiotic | Macrobiotic refers to the macrobiota, a region's living organisms (or flora and fauna) large enough to be seen with the naked eye. However, macro- comes from the greek makros meaning not only large but also long. So macrobiotic can also be taken to mean long life. Thus, the idea with a macrobiotic diet is that it is for a long life, that is that the diet will lengthen life. (12 Dec 1998) |
| macrobiotic diet | A diet claimed to promote longevity, often by promoting an emphasis on natural foods and restrictions on non-cereal foods, as well as liquids. (05 Mar 2000) |
| macrobiotics | <study> A theory of diet which places chief emphasis upon cereals and grains, fish and certain vegetables. Based upon the link between potassium and sodium in the body. (19 Jan 1998) |