Scottish National Dictionary (1700–)
About this entry:
First published 1971 (SND Vol. VIII).
SPRAG, n.1 1. A bradnail (Rxb. 1923 Watson W.-B.; ne., em.Sc.(a), wm.Sc. 1971). Also in n.Eng. dial.
2. A codling (Fif. 1971). Also in Eng. dial.[Orig. doubtful, phs. Scand. Cf. Swed. dial. spragge, a twig. The orig. meaning may have been a small wooden pin. Cf. sim. development of Eng. sprig, a twig, a small nail, and for cogn. words see Sprack, n.2]
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"Sprag n.1". Dictionary of the Scots Language. 2004. Scottish Language Dictionaries Ltd. Accessed 6 Oct 2022 <http://www.dsl.ac.uk/entry/snd/sprag_n1>