Spang

n. [A-S. & N. H. Ger. spange, O. H. Ger. spanga, D. spang, probably from A-S. & O. H. Ger. spannan, to span, clasp, join.] A spangle or shining ornament. [Obs.] “With glittering spangs that did like stars appear.” Spenser.

n. A bound or spring. [Scot.] Jamieson.

v. i. To spring with elastic force. [Scot.]

But when they spang o’er reason’s fence, We smart for’t at our own expense. Ramsay.