Source : Webster's Revised Unabridged Dictionary (1913)

Orpin \Or"pin\, n. [F., orpiment, also, the plant orpine. See
   {Orpiment}.]
   1. A yellow pigment of various degrees of intensity,
      approaching also to red.

   2. (Bot.) The orpine.

Source : WordNet®

orpin
     n : perennial northern temperate plant with toothed leaves and
         heads of small purplish-white flowers [syn: {orpine}, {livelong},
          {live-forever}, {Sedum telephium}]