supercritical

adjective

• above a critical threshold, in particular:
• (in nuclear physics) containing or involving more than the critical mass.
• (of a flow of fluid) faster than the speed at which waves travel in the fluid.
• denoting an aerofoil or aircraft wing designed to tolerate shock-wave formation at transonic speeds.
• relating to or denoting a fluid at a temperature and pressure greater than its critical temperature and pressure.