scuba
n. uncountablen. equipment that divers wear to breathe underwater. It usually includes a tank of air on the diver's back and a tube for the mouth.
n. an apparatus used by divers for breathing underwater, consisting of a portable cylinder of compressed air and a regulator. Originally an acronym for 'Self-Contained Underwater Breathing Apparatus'.
He took a SCUBA course before his trip to the ocean.
The instructor checked every piece of SCUBA gear twice before allowing the students to enter the water.
Modern SCUBA technology has evolved significantly since the mid-twentieth century, allowing researchers to remain submerged for extended periods to document fragile coral reef ecosystems.
Often used as a modifier before other nouns, such as 'SCUBA gear', 'SCUBA diving', or 'SCUBA tank'.