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.

insomnĭa, ae, f. (plur. insomnia, n., Plin. 20, 9, 33, § 82; Prop. 2, 25, 47; Val. Fl. 1, 329; 7, 6; 2, 140) [insomnis], sleeplessness, want of sleep (class.): consequitur comes insomnia, Caecil. ap. Non. 209, 15: aut mox noctu te adiget horsum insomnia, Ter. Eun. 2, 1, 13 Fleck. (Umpfenbach, adigent, v. insomnium): incitabatur insomnia, Suet. Cal. 50.
In plur.: neque insomniis, neque labore fatigari, Sall. C. 27, 2: insomniis carere, Cic. de Sen. 13, 44.

1. insomnĭum, ĭi, n. [in-somnus], a dream (mostly in plur.).

        1. (α) In sing.: illud haud ambigitur, qualicumque insomnio ipsi fratrique perniciem allatam, Tac. A. 11, 4: per insomnium dicere, in a dream, Arn. 7, 244: ipsa insomnii verba, Macr. Somn. Scip. 1, 3.
        2. (β) In plur., Ter. Eun. 2, 1, 13 Umpfenbach; Tib. 3, 4, 1; Verg. A. 4, 9; 6, 896; Sil. 10, 358; 11, 102; Plin. 18, 12, 30, § 118.