rotary engine

noun

1. an engine, as a turbine, in which the impelling fluid produces torque directly rather than by acting upon reciprocating parts.

2. a revolving radial engine.

rotary engine

noun

1. an internal-combustion engine having radial cylinders that rotate about a fixed crankshaft

2. an engine, such as a turbine or wankel engine, in which power is transmitted directly to rotating components

Word History and Origins

Origin of rotary engine¹

First recorded in 1810–20