Lewis & Short

septunx, uncis, m. [septem-uncia; cf. Varr. L. L. 5, § 171 Müll.].

  1. I. Lit., seven twelfths of a whole (v. as, 1.): jugeri, Col. 5, 1, 11; Liv. 5, 24, 4: auri, seven ounces, id. 23, 19, 16.
  2. II. Transf., seven things of a kind, seven pieces, etc.; hence, in drinking, seven cups, Mart. 8, 51, 25; 3, 82, 29.