資料來源 : Webster's Revised Unabridged Dictionary (1913)

Oxalic \Ox*al"ic\, a. [From {Oxalis}: cf. F. oxalique.] (Chem.)
   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.

   {Oxalic acid} (Chem.), 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.

資料來源 : WordNet®

oxalic acid
     n : a toxic colorless crystalline organic acid found in oxalis
         and other plants; used as a bleach and rust remover and
         in chemical analysis [syn: {ethanedioic acid}]