the knee bones; the carpus of the knee, (same as 腕) the wrist
䯛【亥集上】【骨部】 康熙筆画:18画,部外筆画:8画
《篇海》烏貫切,音惋。膝䯛也。《唐書·孝友傳》張進昭截左䯛,廬于墓。