| thermo- or (before a vowel) therm- | |
| —combining form | |
| related to, caused by, or measuring heat: thermodynamics; thermophile | |
| [from Greek thermos hot, thermē heat] | |
| therm- or (before a vowel) therm- | |
| —combining form | |
| [from Greek thermos hot, thermē heat] | |
therm- pref.
Variant of thermo-.
| thermo- or therm-
A prefix that means "heat," as in thermometer. |