Definition of derricks:
(n) :
A device that is used for lifting and moving large objects.
(n) :
A framework that is constructed over a mine or oil well for the purpose of boring or lowering pipes.
(v) :
(transitive) To hoist with, or as if with, a derrick.
(v) :
(transitive, baseball, informal) To remove (a pitcher).
(n) :
(obsolete) An executioner responsible for hanging convicts; a hangman.
(n) :
A male given name from the Germanic languages, variant of Derek.