Scottish National Dictionary (1700–)
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First published 1952 (SND Vol. III).
This entry has not been updated since then but may contain minor corrections and revisions.
DOLLY, n.2 Mining: “a vertical roof support based not on the pavement but on the building” (Sc. 1944 (per Edb.6)).
[Cf. Eng. dolly, applied to wooden props or poles used for various purposes.]
