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bur oak

noun
1.
an oak tree, Quercus macrocarpa, of eastern North America, having shiny, dark-green leaves, light-gray deeply ridged bark, and very large acorns with a fringed cup, yielding a hard, durable wood: the state tree of Illinois.
Origin
1805-1815
1805-15, Americanism
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for bur oak
  • Mast-producing trees such as bur oak and hackberry have also been planted at this site.
  • The north-facing slopes are characterized by a relatively narrow zone of bur oak skirting the prairie.
  • bur oak dominates the driest sites as long as fires occur frequently.
British Dictionary definitions for bur oak

bur oak

noun
1.
an E North American oak, Quercus macrocarpa, having fringed acorn cups and durable timber
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for bur oak

((Quercus macrocarpa), North American timber tree belonging to the white oak group of the genus Quercus in the beech family (Fagaceae), distributed primarily throughout the central United States. Often 25 metres (80 feet) tall, the tree may reach 50 metres. Its leaves, about 25 centimetres (10 inches) long, are dark green and shiny above, dull and whitish beneath; the wide upper half of each leaf is separated from the narrow lower part by two deep sinuses. Bur oak is also called mossy-cup oak for its heavily fringed acorn cups. It has become a popular ornamental and shade tree in urban areas because of its resistance to insect and fungal attack, drought, and air pollution. Previously common in oak savannas and prairies, the tree is well adapted to fire with its corky, fire-resistant bark

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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