Scottish National Dictionary (1700–)
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First published 1956 (SND Vol. IV).
†FROCK, n.1 A variant of Throck, q.v., a name applied to the third, fourth and fifth pairs of oxen counting from the front in a twelve-oxen plough, each pair being qualified by an adj., as fore-frock, mid-frock, hin(d)-frock (Abd. 1825 Jam., 1858 J. B. Pratt Buchan 18; ne.Sc. 1881 Gregor Folk-Lore 179). Comb.: frock-soam, a chain fixed to the yoke of the hindermost oxen and reaching to that of the oxen before them (Lth., Rxb. 1825 Jam., s.v. sowme).[For f < th, see F, 1.]
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"Frock n.1". Dictionary of the Scots Language. 2004. Scottish Language Dictionaries Ltd. Accessed 23 May 2022 <http://www.dsl.ac.uk/entry/snd/frock_n1>