thermalmark
nounUK /ˈθɜː.məl.mɑːk/
US /ˈθɝː.məl.mɑːrk/
A thermalmark is a special mark made by heat that shows something is real or safe.
The teacher pointed to the thermalmark on the ticket to prove it was not fake.
SYNONYMS
RELATED WORDS
OTHER MEANINGS
2. A change in color on paper or plastic caused by heat.
The thermalmark showed where the iron had touched the fabric.
3. A hidden pattern that only appears when something gets warm.
Scientists used a thermalmark to track how hot the metal became.
4. A brand burned onto wood or leather to show who made it.
The old wooden box had a thermalmark from the craftsman.