an engine having a trunk piston or pistons.
a double-acting steam engine having a connecting rod passing through a trunk to the piston.
Origin of trunk engine
First recorded in 1860–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for trunk engine
Historical Examples of trunk engine
The “trunk-engine” was still another of the almost innumerable inventions of Watt.A History of the Growth of the Steam-Engine
Robert H. Thurston