aeneous
/ˈiːnɪəs/ /eɪˈiːnɪəs/Chiefly Entomology
adjective
Resembling brass in colour or lustre; brassy.
Origin
Early 19th century; earliest use found in Transactions of the Linnean Society of London. From classical Latin aēneus (also ahēneus) made of copper or bronze, brazen + -ous.