thermostability

thumb|Crystal structure of β-[[glucosidase from Thermotoga neapolitana (PDB: 5IDI). Thermostable protein, active at 80°C and with unfolding temperature of 101°C.]]

In materials science and molecular biology, thermostability is the ability of a substance to resist irreversible change in its chemical or physical structure, often by resisting decomposition or polymerization, at a high relative temperature.