The Collaborative International Dictionary of English v.0.48:

Sage \Sage\, n. [OE. sauge, F. sauge, L. salvia, from salvus
   saved, in allusion to its reputed healing virtues. See
   Safe.] (Bot.)
   (a) A suffruticose labiate plant (Salvia officinalis) with
       grayish green foliage, much used in flavoring meats, etc.
       The name is often extended to the whole genus, of which
       many species are cultivated for ornament, as the scarlet
       sage, and Mexican red and blue sage.
   (b) The sagebrush.
       [1913 Webster]

   Meadow sage (Bot.), a blue-flowered species of Salvia
      (Salvia pratensis) growing in meadows in Europe.

   Sage cheese, cheese flavored with sage, and colored green
      by the juice of leaves of spinach and other plants which
      are added to the milk.

   Sage cock (Zool.), the male of the sage grouse; in a more
      general sense, the specific name of the sage grouse.

   Sage green, of a dull grayish green color, like the leaves
      of garden sage.

   Sage grouse (Zool.), a very large American grouse
      (Centrocercus urophasianus), native of the dry sagebrush
      plains of Western North America. Called also cock of the
      plains. The male is called sage cock, and the female
      sage hen.

   Sage hare, or Sage rabbit (Zool.), a species of hare
      (Lepus Nuttalli syn. Lepus artemisia) which inhabits
      the arid regions of Western North America and lives among
      sagebrush. By recent writers it is considered to be merely
      a variety of the common cottontail, or wood rabbit.

   Sage hen (Zool.), the female of the sage grouse.

   Sage sparrow (Zool.), a small sparrow (Amphispiza Belli,
      var. Nevadensis) which inhabits the dry plains of the
      Rocky Mountain region, living among sagebrush.

   Sage thrasher (Zool.), a singing bird (Oroscoptes
      montanus) which inhabits the sagebrush plains of Western
      North America.

   Sage willow (Bot.), a species of willow (Salix tristis)
      forming a low bush with nearly sessile grayish green
      leaves.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Centrocercus urophasianus
    n 1: large grouse of sagebrush regions of North America [syn:
         sage grouse, sage hen, Centrocercus urophasianus]