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Rudder

rudder

Origin: OE. Rother, AS. Rother a paddle; akin to D. Roer rudder, oar, G. Ruder, OHG. Roadar, Sw. Roder, ror, Dan. Roer, ror.

See row to propel with an oar, and cf. Rother.

1. The mechanical appliance by means of which a vessel is guided or steered when in motion. It is a broad and flat blade made of wood or iron, with a long shank, and is fastened in an upright position, usually by one edge, to the sternpost of the vessel in such a way that it can be turned from side to side in the water by means of a tiller, wheel, or other attachment.

2. That which resembles a rudder as a guide or governor; that which guides or governs the course. For rhyme the rudder is of verses. (Hudibras) balance rudder, ropes connected with the rudder chains.


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Cheetah and leopard

... greyhound-like body is streamlined over light bones. Small collarbones and vertical shoulder blades help lengthen the stride. The tail acts as a rudder for quick turning plus the eye's retinal fovea is of an elongated shape, giving the cheetah a sharp, wide-angle view of its surroundings. The ...

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by Ange
Wed Jun 08, 2005 3:10 am
 
Forum: Zoology Discussion
Topic: Cheetah and leopard
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