Lewis & Short

ulna, ae, f. [Gr. ὠλένη; Goth. aleina; Germ. Elle; cf. Ellenbogen; Engl. ell], the elbow.

  1. I. Lit., Plin. 11, 43, 98, § 243.
  2. II. Transf.
    1. A. Poet., in gen., the arm: tremula patris dormientis in ulnā, Cat. 17, 13; Prop. 2, 18 (3, 10), 9; Ov. M. 7, 847; 9, 652; 11, 63; Luc. 3, 664; Sil. 3, 457; 10, 499; Stat. S. 5, 3, 266 al.
    2. B. As a measure of length.
      1. 1. An ell, Verg. E. 3, 105; id. G. 3, 355; Hor. Epod. 4, 8; Ov. M. 8, 748.
      2. 2. As much as a man can clasp with both arms, a fathom, Plin. 16, 40, 76, § 202.