Sc. and north. Also 8 wetter, 9 wither, w(h)utter, etc. (see E. D. D.). [Of obscure origin; cf., however, ME. wither-hoked (WITHER-1 3) and dial. witter-huked (Lonsdale Gloss., 1869).] pl. The barbs of an arrow, fishing-spear, fish-hook, or the like. (rare in sing.) Hence Wittered a., barbed.

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1775.  H. Foord, in Trans. Soc. Arts (1784), II. 197. The other [whale] was lost,… by the Wetters, or Feathers of the Harpoon, giving way and bending. Ibid., 198. With one Wetter towards the fish’s head, the other towards her tail.

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1792.  Archaeol. Scot., I. 392. In process of time, the lozenge form fell into disuse, and the arrow head was formed with two witters.

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1815.  Scott, Guy M., xxvi. He deserved his paiks for’t—to put out the light when the fish was on ane’s witters!

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1820.  Scoresby, Acc. Arctic Regions, II. 223. The harpoon … consists of three conjoined parts, called the ‘socket,’ ‘shank,’ and ‘mouth’; the latter of which includes the barbs or ‘withers.’

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a. 1824.  in Mactaggart, Gallovid. Encycl., 6. They’d soon be darting in him Mony a witterd poisonous stang.

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1894.  Northumbld. Gloss., Wuttered, barbed.

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