bimetal

[bahy-met-l]
noun
1.
a material made by the bonding of two sheets or strips of different metals, each metal having a different coefficient of thermal expansion.
adjective

Origin:
1920–25; bi-1 + metal, or as back formation from bimetallic

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
bimetal

adjective
1. formed of two different metals or alloys; especially in sheets bonded together 

noun
1. material made by bonding together sheets of two different metals 
WordNet® 3.0, © 2006 by Princeton University.
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Example sentences
The bimetal element is coiled, fixed at one end, and attached to a pointer stem at the other end.
These stresses can affect the tension of the bimetal coil, which necessitate calibration of the thermometer before reuse.
Bimetal cans are tin cans with an aluminum top that used to be common beverage containers throughout the country.
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