5. (Mach.) A piece, usually a plate, applied to a sliding piece, to
receive wear and afford a means of adjustment; -- also called shoe, and
gib.
Slipper animalcule (Zoöl.), a ciliated infusorian of the genus
Paramecium. -- Slipper flower.(Bot.) Slipperwort. - - Slipper limpet,
or Slipper shell (Zoöl.), a boat shell.