Spelk \Spelk\, n. [AS. spelc, spilc, a little rod by which a thing is kept straight, a splint for binding up broken bones, akin to Icel. spelkur, pl., a splint. Cf. {Spell} a splinter.] A small stick or rod used as a spike in thatching; a splinter. [Prov. Eng.] --Grose.