noun Date: 1837 any of various engines (as a turbine) in which power is applied to vanes or similar parts constrained to move in a circular path, a radial engine in which the cylinders revolve about a stationary crankshaft
ROTARY ENGINE
Meaning of ROTARY ENGINE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012