| much | (noun) a great amount or extent | - |
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| muchness | (noun) greatness of quantity or measure or extent | - |
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| mucilage | (noun) a gelatinous substance secreted by plants | - |
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| (noun) cement consisting of a sticky substance that is used as an adhesive | Synonyms: glue, gum |
| mucin | (noun) a nitrogenous substance found in mucous secretions; a lubricant that protects body surfaces | - |
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| muck | (noun) any thick, viscous matter | Synonyms: goo, gook, goop, guck, gunk, ooze, slime, sludge |
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| (noun) fecal matter of animals | Synonyms: droppings, dung |
| muckheap | (noun) a heap of dung or refuse | Synonyms: dunghill, midden, muckhill |
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| muckhill | (noun) a heap of dung or refuse | Synonyms: dunghill, midden, muckheap |
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| muckle | (noun) (often followed by `of') a large number or amount or extent | Synonyms: batch, deal, flock, good deal, great deal, hatful, heap, lot, mass, mess, mickle, mint, mountain, passel, peck, pile, plenty, pot, quite a little, raft, sight, slew, spate, stack, tidy sum, wad |
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| muckraker | (noun) one who spreads real or alleged scandal about another (usually for political advantage) | Synonyms: mudslinger |
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| muckraking | (noun) the exposure of scandal (especially about public figures) | - |
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| mucoid | (noun) any of several glycoproteins similar to mucin | - |
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| mucopolysaccharide | (noun) complex polysaccharides containing an amino group; occur chiefly as components of connective tissue | - |
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| mucopolysaccharidosis | (noun) any of a group of genetic disorders involving a defect in the metabolism of mucopolysaccharides resulting in greater than normal levels of mucopolysaccharides in tissues | - |
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| mucor | (noun) any mold of the genus Mucor | - |
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| mucosa | (noun) mucus-secreting membrane lining all body cavities or passages that communicate with the exterior | Synonyms: mucous membrane |
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| mucoviscidosis | (noun) the most common hereditary disease; the child's lungs and intestines and pancreas become clogged with thick mucus; caused by defect in a single gene; no cure is known | Synonyms: CF, cystic fibrosis, fibrocystic disease of the pancreas, pancreatic fibrosis |
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| mucuna | (noun) any of several erect or climbing woody plants of the genus Mucuna; widespread in tropics of both hemispheres | - |
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| mucus | (noun) protective secretion of the mucous membranes; in the gut it lubricates the passage of food and protects the epithelial cells; in the nose and throat and lungs it can make it difficult for bacteria to penetrate the body through the epithelium | Synonyms: mucous secretion |
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