manteltree
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man·tel·tree
(măn′tl-trē′)n.
A beam that serves as a lintel over a fireplace, supporting the masonry above.
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.
manteltree
(ˈmæntəlˌtriː) ormantletree
n
(Architecture) a beam made of stone or wood that forms the lintel over a fireplace
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014