Building Trades. a log, concrete block, etc., buried in the ground as an anchor.
a crutchlike prop temporarily supporting a pole or mast being erected.
3. Nautical. a.
fixed on shore to hold a mooring line
a rope for hauling the boom of a derrick inboard after discharge of a load of cargo.
4. Also, dead-man's. Machinery, Automotive.
of or pertaining to a control
or switch on a powered machine or vehicle that disengages a blade or clutch, applies the brake, shuts off the engine, etc., when the driver or operator ceases to press a pedal, squeeze a throttle, etc.: deadman throttle; dead-man's control.
is always a great word to know.
So is quincunx. Does it mean: