from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An inward stroke, especially a piston stroke moving away from the crankshaft.
from the GNU version of the Collaborative International Dictionary of English
- n. An inward stroke; specif., in a steam or other engine, a stroke in which the piston is moving away from the crank shaft; -- opposed to
from The Century Dictionary and Cyclopedia
- n. In an engine, that stroke during which the plunger enters into the cylinder; in a single-acting engine, the exhaust stroke.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the stroke of an engine piston moving away from the crankshaft
Sorry, no etymologies found.
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.
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.
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