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backward and forward | backwardation | backwardly | backwardness | backwards | backwash | backwater | backwoods | backwoodsman | backworm | backyard


Noun, Verb (transitive)


backwashv. t. 
  •  To clean the oil from (wool) after combing.  Ash.  [1913 Webster]
  •  To clean (a filter, a chromatography column, a water softener, etc.) by passing liquid through in the reverse of the normal direction of flow. This procedure dislodges particles which clog the pores of the filter or column packing, removing them from the filter or column.  [PJC]
  •  The flow of water propelled backward by the propeller, paddle wheel, or oars of a boat.  [PJC]
  •  The backward flowing air within the wash of an airplane, caused mostly by the engine.  [PJC]


backwash, n.
1 a receding waves created by the motion of a ship etc. b a backward current of air created by a moving aircraft.
2 repercussions.



Charybdis, Maelstrom, back stream, backcountry, backflow, backlash, backwater, backwoods, boondocks, bush, clout, condensation trail, contrail, countercurrent, counterflow, counterflux, eddy, exhaust, force, gulf, gurge, hinterland, impact, impress, impression, imprint, maelstrom, mark, print, reaction, recoil, reflex, refluence, reflux, regurgitation, repercussion, response, sticks, stream, swirl, track, twirl, up-country, vapor trail, vortex, wake, wash, whirl, whirlpool

For further exploring for "backwash" in Webster Dictionary Online

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