derrick -
a simple crane having lifting tackle slung from a boom
derrick -
a framework erected over an oil well to allow drill tubes to be raised and lowered
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Wiktionary
Substantiv
derrick -
A device that is used for lifting and moving large objects.
derrick -
A framework that is constructed over a mine or oil well for the purpose of boring or lowering pipes.
Wikipedia
A derrick is a lifting device composed of one mast or pole which is hinged freely at the bottom. It is controlled by lines (usually four of them) powered by some means such as man-hauling or motors, so that the pole can move in all four directions. A line runs up it and over its top with a hook on the end, like with a crane.
