nOxyacid(Chem) An acid containing oxygen, as chloric acid or sulphuric acid; -- contrasted with the hydracids, which contain no oxygen, as hydrochloric acid. See Acid, and Hydroxy-.
Century Dictionary and Cyclopedia
noxyacidAn acid containing oxygen. Also called oxacid.
noxyacidThis term was formerly used to distinguish an acid containing oxygen from one in which this element is not present, as sulphuric acid, H2SO4, from hydrochloric; acid, HCl. In modern organic chemistry the same term is often applied to an acid which contains both a carboxyl and a hydroxyl group, as oxyacetic or glycolic acid, CH2.HO.COOH. Substances of this kind are perhaps better called hydroxyacids or alcohol acids.
Webster's Revised Unabridged Dictionary
Oxy-, + acid,
The unsaturated acids, also received much attention, and he discovered the internal anhydrides of oxyacids, termed lactones.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 4" by Various