渐新统 jiànxīntǒng Oligocene Origin Definitions Defs Strokes Stroke Words Sentences Sents 渐 漸 jiàn adverb gradually slowly; by degrees; little by little新 xīn adjective new new; fresh; up-to-date; newly appearing or just discovered统 統 tǒng series (geology) a chronostratigraphic unit below a system and above a stage, corresponding to an epoch in geochronology