sugar maple

noun
any of several maples having a sweet sap, especially Acer saccharum (the state tree of New York, Vermont, West Virginia, and Wisconsin), having a short trunk and long, curving branches, yielding a hard wood used for making furniture and being the chief source of maple sugar.

Origin:
1725–35, Americanism

sugar-maple, adjective
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World English Dictionary
sugar maple
 
n
a North American maple tree, Acer saccharum, that is grown as a source of sugar, which is extracted from the sap, and for its hard wood

Collins English Dictionary - Complete & Unabridged 10th Edition
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Encyclopedia Britannica
Encyclopedia

sugar maple

(Acer saccharum) large tree in the soapberry family (Sapindaceae), native to eastern North America and widely grown as an ornamental and shade tree. It is a commercially important source of maple syrup, maple sugar, and hardwood lumber useful in furniture manufacture and flooring. Some trees develop special grain patterns such as bird's-eye maple (with dots suggesting eyes of birds) and curly and fiddleback maple, with wavy and rippled grain, respectively. The sugar maple may grow to a height of 40 m (130 feet). It has a dense crown of leaves, which turn various shades of gold to scarlet in fall. Its three- to five-lobed leaves appear after the greenish yellow flowers of spring. The fruits are paired samaras, or keys. Smooth grayish bark on the trunk and branches gradually furrows with age. The leaf of the sugar maple is the national emblem of Canada.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
For example, a sugar maple won't produce maple sugar in a warm climate.
Red maple and sugar maple may also be affected but usually to a lesser degree.
Sugar maple is the preferred species for producing maple products since the sap
  has higher sugar content than other species.
Sap collected from sugar maple trees is concentrated by boiling to make maple
  syrup.
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