genus Tsuga, Tsuga - hemlock; hemlock fir; hemlock spruce

hemlock - soft coarse splintery wood of a hemlock tree especially the western hemlock

Canadian hemlock, eastern hemlock, spruce pine, Tsuga canadensis - common forest tree of the eastern United States and Canada; used especially for pulpwood

Carolina hemlock, Tsuga caroliniana - medium-sized evergreen of southeastern United States having spreading branches and widely diverging cone scales

black hemlock, mountain hemlock, Tsuga mertensiana - large evergreen of western United States; wood much harder than Canadian hemlock

Pacific hemlock, Tsuga heterophylla, west coast hemlock, western hemlock - tall evergreen of western North America; commercially important timber tree

conifer, coniferous tree - any gymnospermous tree or shrub bearing cones