Sprag

n. A young salmon. [Prov. Eng.] Grose.

n. [Cf. SPRIG.] A sprig; also, a billet of wood.

[imp. & p. p. SPRAGGED; p. pr. & vb. n. SPRAGGING.] [See supra.] (Mining & Railways.) To stop, as a car, by putting a sprag in the spokes of the wheel, when on a steep grade. R. S. Poole.

a. [Written also sprack, sprey, spree, spry.] [Cf. Ir. & Gael. spraic, strength, vigor, spraiceach, vigorous, strong, Fr. spré, a spark, animation, spirit. See SPRY.] Vigorous; sprightly; sprack. [Obs. or Prov. Eng.] “A good sprag memory.” Shak.