clem·a·tis (klěm'ə-tĭs, klĭ-māt'ĭs) n. Any of various ornamental, mostly climbing plants of the genus Clematis, native chiefly to northern temperate regions and having showy, variously colored flowers or decorative fruit clusters.
[Latin clēmatis, a creeping plant, from Greek klēmatis, from klēma, klēmat-, twig.]