Source : Webster's Revised Unabridged Dictionary (1913)

Molle \Mol"le\, a. [See {Moll}.] (Mus.)
   Lower by a semitone; flat; as, E molle, that is, E flat.

Source : WordNet®

molle
     n : small Peruvian evergreen with broad rounded head and slender
         pendant branches with attractive clusters of greenish
         flowers followed by clusters of rose-pink fruits [syn: {pepper
         tree}, {Peruvian mastic tree}, {Schinus molle}]