Lewis & Short

ūmĭdus (less correctly hū-), a, um, adj. [umeo].

  1. I. Prop., moist, humid, damp, dank, wet (freq. and class.): simplex est natura animantis, ut vel terrena sit vel ignea vel animalis vel umida, Cic. N. D. 3, 14, 34; cf.: terrena et umida, id. Tusc. 1, 17, 40: tellus, Lucr. 2, 873; so, terra, id. 6, 1100: ignem ex lignis viridibus atque umidis facere, Cic. Verr. 2, 1, 16, § 45; cf.: (naves) factae subito ex umidā materiā, Caes. B. C. 1, 58: saxa, Lucr. 5, 948 sq.: linguaï templa, id. 4, 622: lumina, Ov. M. 9, 536: creta, Hor. Epod. 12, 10: quanto umidius est solum, Col. 4, 19, 2: ager uliginosus umidissimus, Varr. L. L. 5, 5, 9, § 44: umidissimum cerebrum, Plin. 11, 37, 49, § 133: subices, Enn. ap. Gell. 4, 17, 14: nox, Verg. A. 2, 8: dies, Quint. 11, 3, 27: nulla dies adeo est australibus umida nimbis, Ov. P. 4, 4, 1: solstitia, Verg. G. 1, 100: regna, i. e. of the river, id. ib. 4, 363: caedunt securibus umida vina, i. e. formerly liquid (now frozen), id. ib. 3, 364 Heyn.: caligo, quam circa umidi effuderant montes, Curt. 4, 12, 20: maria, Verg. A. 5, 594: mella, id. ib. 4, 486: umidiora et aquosa, App. Dogm. Plat. 1, p. 9.
    As subst.: ūmĭdum, i, n. (sc. solum), a moist, wet, or damp place: castra in umido locare, Curt. 8, 4, 13: pontes et aggeres umido paludum imponere, Tac. A. 1, 61: herba in umidis nascens, Plin. 24, 11, 63, § 104: Sirius alto Defluit ab caelo mersumque per umida quaerit, i. e. the ocean, Avien. Arat. 755; cf. Cels. praef. 1.
  2. II. Fig., watery, weak: verba, Gell. 1, 15, 1.