HTHC
| Acronym | Definition |
|---|---|
| HTHC | High Temperature Hot Corrosion |
| HTHC | High-Temperature Hydrocarbons (mineral oil alternative) |
| HTHC | Hand-To-Hand Combat |
| HTHC | Healing Touch Health Centre (massages; Canada) |
| HTHC | Hard Time Hustla Crip (Los Angeles gang) |
| HTHC | Who the Heck Cares |