Lewis Short
ob-longus, a, um
* Adj., rather long, longish; oblong (not in Cic. or Caes.): missile telum hastili oblongo,Liv. 21, 8: figura,Plin. 37, 12, 75, § 196: folia,id. 25, 3, 6. § 21: scutula,Tac. Agr. 10.—Comp.: foramen oblongius,Vitr. 21, 8 fin.; 10, 11, 4.
Charlton T. Lewis, Charles Short, A Latin Dictionary