You searched for: “atmospheric engines
atmospheric engine (s) (noun), atmospheric engines (pl)
An expression for early steam engine designs: The term atmospheric engine was given this name because the pressure of the steam was the same as, or near, the envelop of gasses surrounding the Earth.

When Irene was in England, she visited the transportation museum and was impressed with the large atmospheric steam engines on display.

This entry is located in the following units: atmo-, atm- + (page 2) sphero-, spher-, -sphere- (page 1)