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A kind of feldspar commonly showing a beautiful play of colors, and hence much used for ornamental purposes. The finest specimens come from Labrador. See Feldspar.

A granular igneous rock composed almost exclusively of a soda- lime feldspar, usually labradorite.

d for a coarsely crystalline, igneous rock consisting of lamellar pyroxene (diallage) and labradorite, with sometimes chrysolite (olivine gabbro).

d to be extinct, no specimens having been reported since 1878. -- Labrador feldspar. See Labradorite. -- Labrador tea (Bot.), a name of two low, evergreen shrubs of the genus Ledum (L. palustre and L. latifolium), found in Northern Europe and America. They are used as tea in British America, and in Scandinavia as a s…

A granular crystalline rock consisting essentially of a triclinic feldspar (as labradorite) and hypersthene.