| OA | obstructive apnea; occipital artery; occipito-anterior; occiput anterior; octanoic acid; ocular albi... |
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| oxalic | <chemistry> Pertaining to, derived from, or contained in, sorrel, or oxalis; specifically, designating an acid found in, and characteristic of, oxalis, and also certain plant of the Buckwheat family. <chemistry> Oxalic acid, a dibasic acid, existing combined in oxalis as an acid potassium oxalate, and in many plant tissues as the calcium oxalate. It is prepared on a large scale, by the action of fused caustic soda or potash on sawdust, as a white crystalline substance, which has a strong acid taste, and is poisonous in large doses. It is used in dyeing, calico printing, bleaching flax and straw, the preparation of formic acid, and in salts of lemon for removing ink stains, mold, etc. Origin: From Oxalis: cf. F. Oxalique. Source: Websters Dictionary (01 Mar 1998) |
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| oxalic acid | Occurs in plants and is toxic to higher animals by virtue of its calcium binding properties, it causes the precipitation of calcium oxalate in the kidneys, prevents calcium uptake in the gut and is not metabolised. (18 Nov 1997) |
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