instroke

[ in-strohk ]

noun

1. a stroke traveling in an inward direction.
2. (in an engine) the stroke during which the piston moves into the cylinder.

Word History and Origins

Origin of instroke¹

First recorded in 1885–90; in + stroke ¹

Example Sentences

The instroke of the motor compresses the charge into the conical space at the end of the cylinder, and, when fully compressed, ignition is effected by means of the slide I have upon the table.

From Project Gutenberg

Its cycle is: First outstroke, gas and air sucked into the cylinder; first instroke, gas and air compressed into space; second outstroke, impulse due to ignition; second instroke, discharge of exhausted gases.

From Project Gutenberg