from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A European oak (Quercus petraea) having tough, elastic wood.

from The Century Dictionary and Cyclopedia

  • n. A species of oak (Quercus sessiliflora, or, according to some, Q. pubescens) so closely allied to the common oak (Q. Robur) as to be reckoned by some botanists only a variety of it.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. deciduous European oak valued for its tough elastic wood


Perhaps alteration of dun mast : dun2 + mast2.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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