| sprag | A billet of wood; a piece of timber used as a prop. See: Spray a branch. <zoology> A young salmon. Origin: Cf. Icel. Spraka a small flounder. Source: Websters Dictionary (01 Mar 1998) |
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| Sprague-Dawley r. |
a strain of albino rat developed by the Sprague-Dawley Animal Company, widely used in experimental work because of its calmness and ease of handling.
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| sprag | a wooden prop used to support the roof of a mine |
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| sprag | a chock or bar wedged under a wheel or between the spokes to prevent a vehicle from rolling down an incline |
| sprag | small genus of usually perennial herbs having deep woody taproots and flower heads of umbels or cymes |
| sprag | pink clusters of densely packed flowers on prostrate stems resemble upturned pads of cats' feet |
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