mercurous

adjective
mer·cu·rous | \ (ˌ)mər-ˈkyu̇r-əs , ˈmər-kyə-rəs \

Definition of mercurous 

: of, relating to, or containing mercury especially : containing mercury with a valence of one

First Known Use of mercurous

1858, in the meaning defined above

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The first known use of mercurous was in 1858

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mercurous

adjective
mer·cu·rous | \ (ˌ)mər-ˈkyu̇r-əs , ˈmər-kyə-rəs \

Medical Definition of mercurous 

: of, relating to, or containing mercury especially : containing mercury with a valence of one

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