Lewis & Short

pinnĭger, gĕra, gĕrum, adj. [1. pinnagero], feather-bearing, i. e. feathered, winged.

  1. I. Lit.: pinnigero, non armigero in corpore tela exercentur, i. e. against birds, Att. ap. Cic. Fam. 7, 33, 1 (Trag. Rel. p. 176 Rib.): amor, Lucr. 5, 1074.
  2. II. Transf, having fins, finny: piscis, Ov. M. 13, 963; Coripp. Johann. 4, 981.