A large alluvial plain of northern China, bordered to the north by the Yanshan Mountains, to the west by the Taihang Mountains and Funiu Mountains, to the southwest by the Dabie Mountains and Tongb...

(obsolete, medicine) The hydrochloride of tetrahydronaphthalene, once used as a mydriatic

plural of multiplicative operation

(obsolete) yarn (twisted fibers for weaving)