Ethionic
Pronunciation : Eth`i*on"ic
Part of Speech : a.
Etymology : [Ethyl + thionic.] (Chem.)
Definition : Defn: Pertaining to, derived from, or designating, an acid so called. Ethionic acid (Chem.), a liquid derivative of ethylsulphuric and sulphuric (thionic) acids, obtained by the action of sulphur trioxide on absolute alcohol.
Source : Webster's Unabridged Dictionary, 1913