D defs.my
Entry 3 senses Webster, 1913

Propeller

/prəp-ĕl'-ẽr/ · Pro·pel·ler · IPA /pɹəˈpɛl.ɚ/
01 n. One who, or that which, propels.
  1. 1.
    One who, or that which, propels.
  2. 2.
    A contrivance for propelling a steam vessel, usually consisting of a screw placed in the stern under water, and made to revolve by an engine; a propeller wheel.
  3. 3.
    A steamboat thus propelled; a screw steamer.
Phrases & compounds
Propeller wheel — the screw, usually having two or more blades, used in propelling a vessel.