riffledadj.
/ˈrɪfld/, U.S. /ˈrɪfəld/ Furrowed or rippled; provided with or broken up by riffles.
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society > occupation and work > equipment > equipment for treating ores > [adjective] > part of gold-washing machine
riffled1859
1804 Agric. Norfolk (Board of Agric.) vii. 276 Sometimes he dibbles on riffled land.
1859 Sci. Amer. 15 Oct. 261/1 The water flows over the rim of the plain pans, and is caught by the larger riffled pans.
1916 Trans. Amer. Inst. Mining Engineers 1915 51 416 The effect of the uniform feed and water distribution over this completely riffled table is to produce uniform velocities in the water.
1927 Chambers's Jrnl. Feb. 109/2 In action the human dry-blower shovels some sand on to the top perforated riffled sheet: and then he shakes the entire machine.
1951 R. E. Kirk & D. F. Othmer Encycl. Chem. Technol. VII. 310 The modern bumping table is a deck concentrator of the riffled or strake type.
1968 J. M. Coulson & J. F. Richardson Chem. Engin. (ed. 2) II. xvii. 691 Riffled tables can be used for separating materials down to about 300-mesh in size, provided that the difference in the densities is large.
1998 R. Stone Damascus Gate i. xviii. 148 Light drifted all round, riffled like water, musically ringing.
This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).
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adj.1804