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Related to ironwood: ironwood tree
name in North America for two groups of trees of the family Betulaceae (birch family), native to the eastern half of the continent. Carpinus caroliniana, also called blue beech and water beech, has smooth gray bark.
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Any of a number of hardwood trees in the United States, including the American hornbeam, the buckwheat, and the eastern hophornbeam.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
1. any of various betulaceous trees, such as hornbeam, that have very hard wood
2. a Californian rosaceous tree, Lyonothamnus floribundus, with very hard wood
3. any of various other trees with hard wood, such as the mopani
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005