腱外膜 jiànwàimó epitenon Origin Definitions Defs Strokes Stroke Words Sentences Sents 腱 jiàn tendon (bound form) tendon; sinew; tough white tissue connecting muscle to bone外膜 wàimó outer membrane A layer of loose connective tissue forming the outermost layer of an organ, such as the heart or blood vessels; often used in contrast to the 内膜 nèimó