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Pro*pel"ler (?), n.


One who, or that which, propels.


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.

<-- (b) an analogous device, rotated by an engine at high speed to provide the forward thrust which propels an airplane through the atmosphere. On each engine is a propeller consisting of a set of at least two elongated blades attached symmetrically to a central rotor. -->


A steamboat thus propelled; a screw steamer.

Propeller wheel,the screw, usually having two or more blades, used in propelling a vessel.<-- propeller blade, the elongated part of an airplane propeller -->


© Webster 1913.