Twāin, a. or n.

a. or n. [A-S. twegen, twā, twā, two, O. Sax. twēna, twā, twē, O. Fries. twēne, twā, twā, Sw. twenne, twā, Dan. tvende, O. H. Ger. zwēne, zwō, zwei, H. Ger. zween, zwo, zwei. See Two and Tway.] Two;—nearly obsolete in common discourse, but used in poetry and burlesque.

When old winter splits the rocks in twain. Dryden.