1.TTWMACHINEa tall machine used for lifting heavy weights, especially on ships 〔尤指船舶上的〕吊杆式起重机,转臂起重机
2.TBa tall tower built over an oil well, used to raise and lower the drill 油井架,钻塔
Examples from the Corpus
derrick• All that was visible through the window was a blue derrick, outfitted with a glass cage that shimmered in the sunlight.• Running forward were a series of derricks.
From Longman Business Dictionary
derrickder·rick /ˈderɪk/ noun [countableC]
1a type of CRANE, used especially for loading and unloading ships
2a tall tower built over an oil well, used to raise and lower the drill
a massive oil derrick
Originderrick
(1700-1800)derrick“structure for hanging criminals”((1600-1700)), perhaps from a person who operated this called Derrick