There is no specific technical term; warm, tepid, and room temperature would all be acceptable in general speech.
Hyperbaric.
Occluded
The warm air rises
warm air
Warm air is lighter than cold air, that means that warm air will rise and the cold air will sink.
The warm air mass
Chinook is a warm air current
warm front
basically a nice warm and hot peace of air in scientific terminology
warm air mass and cold air mass
Diffusion
Occluded
Convection (the movement of warm air) and Radiation (electromagnetic dispersal of energy, mostly through infrared wavelengths in this case)
if a warm front passed overhead you would feel the air cooling down.
The word aerodynamic means, has a shape which permits relatively easy motion through the air, by minimizing air resistance.
The cold air pushes under the warm air.
I pushes the warm air upwards.
The warm air rises