the.com/autoclave

means A sealed chamber that uses high-pressure steam to sterilize equipment by cooking microbes well past the point of survival.

from Built from Latin auto- ('self') and clavis ('key'), autoclave literally means 'self-locking' — a nod to its sealed, pressure-tight door that locks itself shut against the steam inside. The name arrived in the 19th century alongside the device itself, when inventors realized that water under pressure boils hotter than 100°C, and that extra heat is exactly what it takes to kill the stubborn spores plain boiling water lets slide.