(n) synthetic nonsteroid with the properties of estrogen; formerly used to treat menstrual problems but was found to be associated with vaginal cancers in the daughters of women so treated during pregnancy, Syn. DES, stilbesterol
pos>a. (Chem.) Pertaining to, or containing, ethyl and sulphuric acid. [ 1913 Webster ]
Ethylsulphuric acid (Chem.), an acid sulphate of ethyl, H.C2H5.SO4, produced as a thick liquid by the action of sulphiric acid on alcohol. It appears to be the active catalytic agent in the process of etherification. [ 1913 Webster ]