society > occupation and work > equipment > oil and natural gas recovery equipment > [noun] > apparatus for well-sinking (6)
An apparatus used in sinking an oil or gas well; spec. an oil rig.
a structure that supports the drill and other machinery used in drilling for oil.
attributive. Of or relating to searching and testing for natural resources, esp. oil; as exploration rig, exploration well, etc. Cf. sense 3.