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sway plate
sway plate n.
Brit. 
/ˈsweɪ pleɪt/
, /ˈsweɪ pleɪt/U.S. /ˈsweɪ ˌpleɪt/
the plate covering the sway-bar./ˈsweɪ ˌpleɪt/ΘΚΠ
society > travel > means of travel > a conveyance > vehicle > cart, carriage, or wagon > parts of cart or carriage > [noun] > sway-bar or turning-plate
sway-bar1796
turning-plate1797
sweep-bar1802
sway plate1842
sweeping-bar1859
wheel-plate1859
fifth-wheel1874
1842 R. Burn Naval & Mil. Techn. Dict. French Lang. 47 Coiffe de grande sassoire, sway plate, plate covering the sweep bar or sway.
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