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(), n.(Zol.) A cockroach. Roach n.[OE. rroche; cf. AS. reohha, D. rog, roch, G. roche, LG. ruche, Dan. rokke ray, Sw. rocka, and E. ray a fish.] 1. (Zol.) (a) A European fresh-water fish of the Carp family (Leuciscus rutilus). It is silver-white, with a greenish back. (b) An American chub (Semotilus bullaris); the fallfish. (c) The redfin, or shiner. 2. (Naut.) A convex curve or arch cut in the edge of a sail to prevent chafing, or to secure a better fit. As sound as a roach [roach perhaps being a corruption of a F. roche a rock], perfectly sound. Roach v. t. 1. To cause to arch. 2. To cut off, as a horse's mane, so that the part left shall stand upright. スポンサード リンク
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