Heat-seeking refers to a type of technology that seeks out heat sources, such as in heat-seeking missiles or sensors. Some synonyms for heat-seeking include thermal-seeking, infrared-seeking, and temperature-seeking. These terms all refer to detecting and locating sources of heat based on their thermal energy emissions. Other related words may include thermal imaging, thermal detection, and thermal vision. In some cases, heat-seeking may also be used metaphorically to describe a person or thing that is highly attracted to warmth or passion, and synonyms for this could include passion-seeking, desire-seeking, or attraction-seeking.