Lewis & Short

Pictāvi, ōrum, m., a later appellation of the Pictones, Amm. 15, 21; Ven. Carm. 6, 7, 215; 2, 19, 2.
Hence,

  1. A. Pictāva, ae, f., the capital of the Pictavi, the mod. Poictiers, Sulp. Sev. Vit. S. Mart. 5.
  2. B. Pic-tāvĭcus, a, um, adj., Pictavian: rhetor, Aus. Epigr. 51, 2.