Lewis & Short

văpor (ante-class. form văpos, Naev. ap. Non. 487, 10; Lucr. 6, 952; cf. Quint. 1, 4, 13), ōris, m. [Sanscr. kapis, incense; Gr. καπύω, καπνός, smoke; cf. vappa], steam, exhalation, vapor (syn. exhalatio).

  1. I. In gen.: aquarum vapores, qui a sole ex agris tepefactis et ex aquis excitantur, Cic. N. D. 2, 46, 118: aquarum quasi vapor quidam aër habendus est, id. ib. 2, 10, 27; Lucr. 6, 271: aquae calidae, Cels. 7, 7, 10; Scrib. Comp. 20: terrenus vapor siccus est et fumo similis, qui ventos, tonitrua et fulmina facit: aquarum halitus umidus est et imbres et nives creat, Sen. Q. N. 2, 12, 4: nocturnos formidare vapores, Hor. Ep. 1, 18, 93: volat vapor ater ad auras. smoke, Verg. A. 7, 466; Ov. Tr. 5, 5, 40; Stat. Th. 10, 110; Sen. Herc. Fur. 911.
  2. II. In partic., a warm exhalation, warmth, heat, etc.
    1. A. Lit.: (terra semen) tepefactum vapore et compressu suo diffundit, Cic. Sen. 15, 51: aestifer ignis uti lumen jacit atque vaporem, Lucr. 1, 663: solis, id. 1, 1032; 2, 150; 4, 185; 4, 201; 6, 236; Curt. 7, 5, 3; of the heat of the thunderbolt: inusta vaporis signa, Lucr. 6, 220: finditque vaporibus arva (Phoebus), Ov. M. 3, 152: siderum, Hor. Epod. 3, 15: lentusque carinas Est vapor, Verg. A. 5, 683; cf. id. ib. 698: locus torridus et vaporis plenus, Liv. 5, 48, 1: vapore foveri, Cels. 7, 7, 2; 7, 7, 10; 7, 9 fin.; 8, 4; 8, 7; Col. 1, 4, 10; 7, 3, 8 al.
    2. B. Trop., warmth, ardor of love: pectus insanum vapor amorque torret, Sen. Hippol. 640.