ther·mo·dur·ic 
(thûr′mō-drĭk, -dyr-)
(thûr′mō-drĭk, -dyr-)adj.
Capable of surviving high temperatures, especially those of pasteurization. Used of a microorganism.
[THERMO- + Latin dūrāre, to last; see deuə- in the Appendix of Indo-European roots + -IC.]