propeller wheel

Webster's Dictionary (GCIDE)

1.One who, or that which, propels. [1913 Webster]

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. [1913 Webster]

3.A steamboat thus propelled; a screw steamer. [1913 Webster]

Propeller wheel,the screw, usually having two or more blades, used in propelling a vessel. [1913 Webster]