单词 citigrade 释义 citigrade, a.|stgred|[f. mod.L. citigrada, f. L. citus swift + gradus step: cf. F. citigrade.]lit. Moving swiftly; applied to a tribe of swift-moving spiders, Citigrada, and subst. one of these.1845Darwin Voy. Nat. viii. (1870) 160 A...