noun Scuba Diving.
an inflatable vest used to control one's buoyancy underwater or to rest at the surface, usually having a connecting hose for inflation or deflation by mouth and a CO2 cartridge for rapid, emergency inflation.
Words nearby buoyancy compensator
Also called BC, buoyancy control device.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020