Word Study
Oxalic
CIDE DICTIONARY
Oxalic, a. [From Oxalis: cf. F. oxalique.].
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. [1913 Webster]
For further exploring for "Oxalic" in Webster Dictionary Online