Also 9 dial. -shack. [f. WIND sb.1 + SHAKE sb.1 9 a.] A flaw or crack in timber, supposed to be due to a strain caused by the force of the wind.
1545. Ascham, Toxoph. (Arb.), 114. Not marred with knot, gaule, wyndeshake, wem.
1824. Carr, Craven Gloss., Wind-shacks, cracks in wood, occasioned, it is supposed by the wind.
1866. Treas. Bot., Wind-shake. See Anemosis.
