{ } a. [ L. septentrionalis: cf. F. septentrional. ] Of or pertaining to the north; northern. “From cold septentrion blasts.” Milton. [ 1913 Webster ]
n. Northerliness. [ 1913 Webster ]
adv. Northerly. [ 1913 Webster ]
n. [ Pref. tri- + sulphonal; -- so called because it contains three ethyls. ] (Chem.) A compound similar to sulphonal, used as a hypnotic in medicine. [ Webster 1913 Suppl. ]