Scottish National Dictionary (1700–)
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First published 1956 (SND Vol. IV).
This entry has not been updated since then but may contain minor corrections and revisions.
GRAGGAM, n. A kind of putty made with whitening and Archangel tar and used by coopers for plugging knots in the inside of casks (Abd. (coast) 1916 T.S.D.C. II., Abd.27 1955). [′grɑgəm]
[? Phs. a corruption of Claggum, with extended meaning.]