a. [ Ethyl + thionic. ] (Chem.) Pertaining to, derived from, or designating, an acid so called. [ 1913 Webster ]
Ethionic acid (Chem.), a liquid derivative of ethylsulphuric and sulphuric (thionic) acids, obtained by the action of sulphur trioxide on absolute alcohol.
a. [ Is- + ethionic. ] (Chem.) Pertaining to, derived from, or designating, an acid, HO.C2H4.SO3H, obtained as an oily or crystalline substance, by the action of sulphur trioxide on alcohol or ether. It is derivative of sulphuric acid. [ 1913 Webster ]
a. [ Methyl + thionic. ] (Chem.) Of, pertaining to, or designating, a sulphonic (thionic) acid derivative of methane, obtained as a stable white crystalline substance, CH2.(SO3H)2, which forms well defined salts. [ 1913 Webster ]
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