therm-

1.
variant of thermo- before a vowel:
thermesthesia.
British Dictionary definitions for therm-

thermo-

combining form
1.
related to, caused by, or measuring heat: thermodynamics, thermophile
Word Origin
from Greek thermos hot, thermē heat
therm- in Medicine

therm- pref.
Variant of thermo-.

therm- in Science
thermo- or therm-  
A prefix that means "heat," as in thermometer.