How is Theater Sterile Supply Unit hospital unit abbreviated? TSSU stands for Theater Sterile Supply Unit hospital unit . TSSU is defined as Theater Sterile Supply Unit hospital unit very rarely..TSSU stands in solidarity with the Indigenous led movement to protect our environment against the ecological and economic dangers posed by the Kinder Morgan tar . . .TSSU is listed in the World’s largest and most authoritative dictionary database of abbreviations and acronyms. TSSU What does TSSU stand for? The Free Dictionary..