Lewis & Short

cĕlox, ōcis, f. [celer, cello] (orig. adj., related to celer, as atrox to ater, ferox to ferus, etc.; cf. Doed. Syn. 2, p. 123; later

  1. I. subst., sc. navis, ratis, etc.), a swift-sailing ship, a cutter, yacht, κέλης, Enn. ap. Isid. Orig. 19, 1, 22; Varr. and Turp. ap. Non. p. 533, 5 sq.; Liv. 21, 17, 3: celocem (celetem, Sillig), Plin. 7, 56, 57, § 208 et saep.; cf. Isid. Orig. l. l.: publica, a packet-boat, Plaut. Capt. 4, 2, 94; humorously for a full belly, id. Ps. 5, 2, 12.
  2. II. Adj., swift, quick, but with reference to the first signif., Plaut. Poen. 3, 1, 40; cf. id. ib. 3, 1, 4; so id. Mil. 4, 1, 40 sq.