The Collaborative International Dictionary of English v.0.48:
mangle \man"gle\, n. [D. mangel, fr. OE. mangonel a machine for
throwing stones, LL. manganum, Gr. ? a machine for defending
fortifications, axis of a pulley. Cf. Mangonel.]
A machine for smoothing linen or cotton cloth, as sheets,
tablecloths, napkins, and clothing, by roller pressure, often
with heated rollers.
Mangle rack (Mach.), a contrivance for converting
continuous circular motion into reciprocating rectilinear
motion, by means of a rack and pinion, as in the mangle.
The pinion is held to the rack by a groove in such a
manner that it passes alternately from one side of the
rack to the other, and thus gives motion to it in opposite
directions, according to the side in which its teeth are
Mangle wheel, a wheel in which the teeth, or pins, on its
face, are interrupted on one side, and the pinion, working
in them, passes from inside to outside of the teeth
alternately, thus converting the continuous circular
motion of the pinion into a reciprocating circular motion
of the wheel.