Definitions for "Oxalic"
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.
Acid: can be used as an acidic reducing agent in the removal of difficult metallic stains from underwater surfaces. Ascorbic acid can be used in a similar manner.
Oxalic acid, used to remove iron staining.