[UNDER-2. Cf. Du. onderzee-, G. untersee-(boot).]
1. Situated or lying below the sea or the surface of the sea; submarine.
1613. Purchas, Pilgrimage, V. xiii. 511. The saltnesse of the sea some ascribe … to vnder-earth or under-sea fires of bituminous nature.
1851. Chamb. Jrnl., 27 Dec., 411. Mr. Wheatstone first conceived the possibility of an under-sea telegraph in 1837.
1861. L. L. Noble, Icebergs, 256. The noises of the waves at play in the long, concealed, under-sea piazzas.
2. Intended for use below the surface of the sea.
1901. Westm. Gaz., 27 Aug., 5/3. The new submarines will be as good as … any under-sea vessel yet constructed.
