Scottish National Dictionary (1700–)
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First published 1968 (SND Vol. VII).
This entry has not been updated since then but may contain minor corrections and revisions.
QUICKEN, n.1 The mountain-ash or rowan, Pyrus aucuparia (s.Sc. 1903 E.D.D.). Also in comb. quicken-tree, id. (Ags. 1848 W. Gardiner Flora Frfsh. 67; Bwk. 1853 G. Johnston Botany E. Borders 79).
[Mid.Eng. quicken, juniper, in E.M.E. rowan; a deriv. of quick, as in quickbeam, the service-tree, O.E. cwictrēow.]