Scottish National Dictionary (1700–)
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First published 1976 (SND Vol. X).
This entry has not been updated since then but may contain minor corrections and revisions.
BLAW-THROUGH, n. The nave of a cart-wheel, esp. an old one from which the spokes have been removed and which is used as a low stool (Lnk. a.1838 Jam. MSS. XII. 25). [So called from the perforations of the spoke-holes.]