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 ]

{ , n. Nostril. [ Obs. ] [ Written also nosethurl, nosthrill. ] Chaucer. [ 1913 Webster ]

a. See Sothic. [ 1913 Webster ]