Paris green

noun

Par·is green | \ ˈper-əs-

How to pronounce Paris green (audio)

, ˈpa-rəs-\

Definition of Paris green

1 : a very poisonous green copper and arsenic compound C₄H₆As₆Cu₄O₁₆ used especially formerly as an insecticide and pigment

2 : a brilliant yellowish green

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The first known use of Paris green was in 1868

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Paris green

noun

Par·is green | \ ˌpar-əs-

\

Medical Definition of Paris green

: a very poisonous copper-based bright green powder Cu(C₂H₃O₂)₂·3Cu(AsO₂)₂ that is used as an insecticide and pigment

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