semisubmersible

[ sem-ee-suh b-mur-suh-buh l, sem-ahy- ]
/ ˌsɛm i səbˈmɜr sə bəl, ˌsɛm aɪ- /

noun

Also called semisubmersible rig. a self-propelled barge that is mounted on partially submerged legs supported by underwater pontoons, rides at anchor, and serves as a work base and living quarters in deep offshore drilling operations.

adjective

of, for, or pertaining to a semisubmersible.

Origin of semisubmersible

First recorded in 1960–65; semi- + submersible
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019