| acarid | (noun) very small free-living arachnid that is parasitic on animals or plants; related to ticks | - |
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| acaridiasis | (noun) infestation with itch mites | Synonyms: acariasis, acariosis |
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| arid | (adjective) lacking sufficient water or rainfall | Synonyms: waterless |
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| (adjective) lacking vitality or spirit; lifeless | Synonyms: desiccate, desiccated |
| aridity | (noun) the quality of yielding nothing of value | Synonyms: barrenness, fruitlessness |
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| (noun) a deficiency of moisture (especially when resulting from a permanent absence of rainfall) | Synonyms: aridness, thirstiness |
| aridness | (noun) a deficiency of moisture (especially when resulting from a permanent absence of rainfall) | Synonyms: aridity, thirstiness |
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| disaccharidase | (noun) an enzyme that catalyzes the hydrolysis of disaccharides into monosaccharides | - |
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| disaccharide | (noun) any of a variety of carbohydrates that yield two monosaccharide molecules on complete hydrolysis | - |
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| larid | (noun) long-winged web-footed aquatic bird of the gull family | - |
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| monosaccharide | (noun) a sugar (like sucrose or fructose) that does not hydrolyse to give other sugars; the simplest group of carbohydrates | Synonyms: monosaccharose, simple sugar |
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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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| oligosaccharide | (noun) any of the carbohydrates that yield only a few monosaccharide molecules on complete hydrolysis | - |
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| polysaccharide | (noun) any of a class of carbohydrates whose molecules contain chains of monosaccharide molecules | Synonyms: polyose |
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| saccharide | (noun) an essential structural component of living cells and source of energy for animals; includes simple sugars with small molecules as well as macromolecular substances; are classified according to the number of monosaccharide groups they contain | Synonyms: carbohydrate, sugar |
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| sciarid | (noun) minute blackish gregarious flies destructive to mushrooms and seedlings | Synonyms: fungus gnat, sciara |
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| semiarid | (adjective) somewhat arid | - |
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| sparid | (noun) spiny-finned food fishes of warm waters having well-developed teeth | Synonyms: sparid fish |
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| tetrasaccharide | (noun) any of a variety of carbohydrates that yield four monosaccharide molecules on complete hydrolysis | - |
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| trisaccharide | (noun) any of a variety of carbohydrates that yield three monosaccharide molecules on complete hydrolysis | - |
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