Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

Prŏpontis (Prōpontis, Manil. 4, 676), ĭdos and ĭdis, f., = Προποντίς,

  1. I. the Propontis or Sea of Marmora, between the Hellespont and the Thracian Bosporus, Mel. 1, 1, 5; 1, 3, 1; Plin. 4, 12, 24, § 76; Liv. 38, 16; Tac. A. 2, 54; Flor. 3, 6; Cat. 4, 9; Ov. P. 4, 9, 118.
    Hence,
  2. II. Prŏpontĭăcus, a, um, adj., of or belonging to the Propontis: aqua, Prop. 3 (4), 21, 1: orae, Ov. Tr. 1, 10, 29.