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
  1. bimetallic.

Origin of bimetal

1920–25; bi-1 + metal, or as back formation from bimetallic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018