ulna/ˈʌlnə; `ʌlnə/ n(pl -nae / -ni:; -ni/) (anatomy 解) inner and thinner of the two bones of the forearm inman; corresponding bone in an animal's foreleg or bird'swing 尺骨. =>illus at skeleton 见skeleton插图. Cf 参看 radius.
牛津英汉双解词典