-ther·mia \ˈthərmēə, ˈthə̄m-, ˈthəim-\noun combining form or-ther·my\ˌ ̷ ̷mē, -mi\ (plural-thermiasor-thermies) Etymology: New Latin -thermia, from Greek thermē heat + Latin -ia -y — more at therm : state of heat : generation of heat < diathermy > < hypothermia >