bimetallic strip
noun/ˌbaɪmətælɪk ˈstrɪp/
/ˌbaɪmətælɪk ˈstrɪp/
- a strip made of two different types of metal which bends when it is heated, used in thermostats
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bimetallic strip
Definition of bimetallic strip noun from the Oxford Advanced Learner's Dictionary