Is “Backlash” a Scrabble word?

1.A sudden backward motion.

2.A negative reaction, objection or outcry, especially of a violent or abrupt nature.

“The public backlash to the proposal was quick and insistent.”

3.The distance through which one part of connected machinery, as a wheel, piston, or screw, can be moved without moving the connected parts, resulting from looseness in fitting or from wear.

1.To cause or set off a backlash.