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Sheet iron or steel plated with an alloy of three or four parts of lead to one part of tin, used as a roofing material.

[Probably French terne, dull (from Old French; see tarnish) + plate.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.



steel plate coated with terne metal.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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References in periodicals archive ?
Historian Prof Peter Jackson has discovered the Washington DC landmark, which was originally built in 1800, used terneplate [metal] roofing from a Welsh company during a later expansion.
A trip to the congressional archives gave him the confirmation he needed, when he discovered an order for 135 boxes of the Gilbertson's terneplate roof dating back to 1886.
Approved safety cans are available in terneplate, stainless steel or polyethylene, and must be equipped with free-flow arresters and spring-closing lids that automatically vent when internal pressure builds up.