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.
†FORECALM, n. Of a loom: see quot.Fif. 1844 P. Chalmers Dunfermline 364:
Heddles and shafts together are sometimes termed calm, or locally forecalm, as being in front of what was once, but now is scarcely used, a backcalm, and having in the earlier stages of the weaving, pieces of calmstone attached to them.
