Bäck'làsh, n.
n. [back and lash.] (Mech.) The reaction or striking back on each other of a set of connected wheels, produced by irregularities in their velocity when the moving power is not uniform, or the load is variable.
n. [back and lash.] (Mech.) The reaction or striking back on each other of a set of connected wheels, produced by irregularities in their velocity when the moving power is not uniform, or the load is variable.