Canadian hemlock

n.
A coniferous evergreen monoecious tree (Tsuga canadensis) native from Nova Scotia to Alaska and valuable for its timber, as a pulpwood, for tanning, and as an ornamental.

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The noun has one meaning:

Meaning #1: common forest tree of the eastern United States and Canada; used especially for pulpwood
  Synonyms: eastern hemlock, spruce pine, Tsuga canadensis

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