Longman Dictionary of Contemporary English
flotation tank
noun
EXAMPLES FROM CORPUS
▪ All right then, how many of your would like to try a session in a flotation tank?
▪ Clients wash and shower before entering the flotation tank.
▪ For the ultimate in relaxation, few treatments can beat the experience of a flotation tank.
▪ The difference between a flotation tank and other relaxation techniques is that other methods require effort on the part of the patient.
Wiktionary
flotation tank
n. isolation tank
Usage examples of "flotation tank".
Tough, it's about the nearest thing to sensory deprivation she can arrange without a flotation tank and suxamethonium injection.
He's twisting and straining, testing the cuffs: tough, it's about the nearest thing to sensory deprivation she can arrange without a flotation tank and suxamethonium injection.