(engineering) A connecting bar or rod, pivoted at each end to the end of another piece, for transmitting motion, especially from one plane to another; specifically, such a piece in an organ stop action to transmit motion from the trundle to the lever actuating the stop slider.
(fortification) The ground plan of a work or works.
“No one would have suspected there was a trace of tension between them.”
“Lifting it out of the water, rinse it with lukewarm water to remove any trace of the detergent.”
“There was enough dust on the floor to have preserved traces of feet.”
tracer
(chemistry) A chemical used to track the progress or history of a natural process.
A round of ammunition for a firearm that contains magnesium or another flammable substance arranged such that it will burn and produce a visible trail when fired in the dark.