adjective
Definition: Referring to a type of floating platform that is partially submerged in water, used for deepwater drilling and other marine activities.
Example: The semisubmersible platform was successfully deployed for oil drilling in the deep sea.
noun
Definition: A type of floating structure used in the ocean that is partially submerged and supported by vertical legs, often used for offshore drilling and as living quarters.
Example: The semisubmersible rig was deployed for the deep-sea oil exploration project.