tŏnī^trus — Lewis & Short
tŏnī^trus, ūs, m., or tŏnī^trŭum, ii (
I gen. tonitrui, Vulg. Marc. 3, 17), n. tono, thunder.
(a) Sing.:
tonitrum auribus accipiamus,Lucr. 6, 164; 6, 171:
tonitrum audire,Plin. 2, 54, 55, § 142:
tonitruum terribile exsistit,id. 36, 13, 19, § 88; Sen. Q. N. 2, 54, 1; 2, 56, 1: auditum praeterea tonitruum, Treb. Gall. 5; Tert. adv. Marc. 3, 6: veri tonitrūs similitudinem imitari, Fest. s. v. Claudiana, p. 57 Müll.: caelum tonitru contremit, Poët. ap. Cic. de Or. 3, 39, 157:
tonitru caelum omne ciebo,Verg. A. 4, 122:
tonitruque tremescunt Ardua terrarum,id. ib. 5, 694.—The nom. tonitru, neutr., rests solely on the authority of grammarians, Fest. s. v. pecuum, p. 246 Müll.; Serv. Verg. A. 5, 694; Charis. p. 18; 23; Prisc. p. 624; 685; 714 P. al.; v. Neue, Formenl. 1, 350 sq.—
(b) Plur. (form tonitra, Att. Trag. 480):
tum fulgores et tonitrua exsistere,Cic. Div. 2, 19, 44; so,
tonitrua,id. ib. 2, 18, 42; id. Phil. 5, 3, 8; Plin. 8, 47, 72, § 188; Ov. M. 1, 55; 12, 52; Juv. 5, 117: clamor tonitruum, Poët. ap. Cic. Fam. 8, 2, 1:
subito coorta tempestas cum magno fragore tonitribusque,Liv. 1, 16; Plin. 2, 54, 55, § 145; 19, 3, 13, § 37; 37, 10, 55, § 150; Ov. M. 11, 496; Phaedr. 5, 7, 23 al.:
tonitrubus,Aur. Vict. Orig. Gent. 14, 2; 20, 1:
movere tonitrus,Ov. M. 2, 308:
tonitrus agis,Stat. Th. 1, 258:
imbres et tonitrus fieri derepente,Gell. 10, 12, 3.