| macrolides | A group of organic compounds that contain a macrocyclic lactone ring linked glycosidically to one or more sugar moieties. (12 Dec 1998) |
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| macrology | Long and tedious talk without much substance; superfluity of words. Origin: L. Macrologia, Gr.; long + discourse: cf. F. Macrologie. Source: Websters Dictionary (01 Mar 1998) |
| macromastia | Macromazia Abnormally large breasts. See: hypermastia. Origin: macro-+ G. Mastos, breast (05 Mar 2000) |
| macromelanosome | A large spherical melanosome (1 to 6 u in diameter) formed in the cytoplasm of melanocytes in cafe-au-lait spots and other melanocytic disorders. Synonym: macromelanosome. (05 Mar 2000) |
| macromelia | Abnormal size of one or more of the limbs. Synonym: megalomelia. Origin: macro-+ G. Melos, limb (05 Mar 2000) |
| macromere | A blastomere of large size, as in amphibians. Origin: macro-+ G. Meros, part (05 Mar 2000) |
| macromerozoite | A large merozoite. Synonym: megamerozoite. Origin: macro-+ G. Meros, part, + zoon, animal (05 Mar 2000) |
| macrominerals | Inorganic nutrients needed in relatively high daily amounts (i.e., more than 100 mg per day) e.g., calcium, phosphorus, sodium, etc. Synonym: macrominerals. (05 Mar 2000) |
| macromolecular chemistry | The chemistry of macromolecules (e.g., proteins, nucleic acids) and polymers (nylon, polyethylene, etc). (05 Mar 2000) |
| macromolecule | Biological term relating to large molecules including, proteins, nucleic acids and carbohydrates, but probably not phospholipids. (18 Nov 1997) |
| macromonocyte | An unusually large monocyte. (05 Mar 2000) |
| macromyeloblast | An abnormally large myeloblast. (05 Mar 2000) |
| macronormoblast | 1. A large normoblast. 2. A large, incompletely haemoglobiniferous, nucleated red blood cell with a "cart-wheel" nucleus. (05 Mar 2000) |
| macronormochromoblast | A large erythroblast. Synonym: macronormochromoblast. (05 Mar 2000) |
| macronucleus | The larger nucleus (or sometimes nuclei) in ciliate protozoans. Derived from the micronucleus by a process of DNA polytenisation. The DNA in the macronucleus is actively transcribed. The macronucleus degenerates before conjugation. (18 Nov 1997) |