(ˌ)thərˈmägrəfē noun
( -es )
Etymology: therm- + -graphy
1. : a process of writing or printing involving the use of heat ; especially : a raised printing process in which matter printed by letterpress is dusted with powder and heated to make the lettering rise
2. : a technique for detecting and measuring variations in the heat emitted by various regions of the body and transforming them into visible signals that can be recorded photographically (as for diagnosing abnormal or diseased underlying conditions) ; also : a similar technique used elsewhere (as on engines)