Scottish National Dictionary (1700–)
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First published 1965 (SND Vol. VI).
This entry has not been updated since then but may contain minor corrections and revisions.
LICK-UP, n. An iron clasp or fitting on a swingle-tree of a plough-draught to which the traces are attached (Cld. 1825 Jam.); a martingale for a horse (Slk. Ib.).
[O.Sc. likup, a martingale, 1561, appar. from Lick, from the similarity of the motion.]
