Source : Webster's Revised Unabridged Dictionary (1913)

Myrrh \Myrrh\, n. [OE. mirre, OF. mirre, F. myrrhe, L. myrrha,
   murra, Gr. ?; cf. Ar. murr bitter, also myrrh, Heb. mar
   bitter.]
   A gum resin, usually of a yellowish brown or amber color, of
   an aromatic odor, and a bitter, slightly pungent taste. It is
   valued for its odor and for its medicinal properties. It
   exudes from the bark of a shrub of Abyssinia and Arabia, the
   {Balsamodendron Myrrha}. The myrrh of the Bible is supposed
   to have been partly the gum above named, and partly the
   exudation of species of {Cistus}, or rockrose.

   {False myrrh}. See the Note under {Bdellium}.

Source : WordNet®

Cistus
     n : small to medium-sized evergreen shrubs of southern Europe
         and North Africa [syn: {genus Cistus}]