derrick
/ˈderɪk/noun
1
- a kind of crane with a movable pivoted arm for moving or lifting heavy weights, especially on a ship（尤指船载）悬转臂起重机; 摇臂吊杆。
2
- the framework over an oil well or similar boring, holding the drilling machinery钻塔; 油井井架。
词源
early 17th cent. （denoting a hangman， also the gallows）： from Derrick, the surname of a London hangman.