antrum, i, n., = ἄντρον, a cave, cavern, grotto (almost entirely confined to the poets).
I Lit.: succedere antro, Verg. E. 5, 19: subire antra, Ov. M. 1, 121: occulere se antro, Val. Fl. 8, 315: ingens, Verg. A. 6, 42: gratum, Hor. C. 1, 5, 3: gelida antra, Verg. G. 4, 509: silvestria, Ov. M. 13, 47: Dionaeo sub antro, Hor. C. 2, 1, 39: vos Caesarem Pierio recreatis antro, id. ib. 3, 4, 40: quibus antris audiar? id. ib. 3, 25, 4: harenosum Libyae Jovis antrum, Prop. 5, 1, 103: effossa antra, Mart. 13, 60; Stat. S. 4, 6; Sil. 6, 149 et saep.—In prose mostly in eccl. Lat., Vulg. Gen. 23, 20; ib. Jud. 6, 2; ib. 1 Reg. 13, 6; ib. Job, 37, 8; 38, 40: per antra et cavas rupes, Suet. Tib. 43.—
II Fig., of the hollow of a tree : ekesae arboris antrum, Verg. G. 4, 44.—Of a sedan : clausum antrum, Juv. 4, 21.—Later, of any cavity : narium, Sid. Ep. 1, 2: palati, id. ib. 9, 13: pectoris, Prud. Psych. 6, 774.