multimetallic
adjective
mul·ti·me·tal·lic
ˌməl-tē-mə-ˈta-lik
-ˌtī-
: containing more than one metal
a multimetallic hydride
… virtually any property of a metal catalyst may be influenced by combining it with another metal, and this concept can be extended to multimetallic catalysts.—Chemical & Engineering News
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Merriam-Webster unabridged
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