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- Noun. A weapon made of leather-covered metal similar to a blackjack.
- Noun. Any of various sorts of blunt instrument such as bludgeon, truncheon or the like) (ref. 1991 edition of Chambers's Dictionary).
- Symbol. (trigonometry) The symbol of the hyperbolic function hyperbolic cosine.
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This entry was last updated on RefTopia from its source on 3/20/2012.