terneplate

[ turn-pleyt ]
/ ˈtɜrnˌpleɪt /

noun

steel plate coated with terne metal.

Origin of terneplate

1855–60; obsolete terne (< French: dull; see tarnish) + plate1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019