Source : Webster's Revised Unabridged Dictionary (1913)

Molluscum \Mol*lus"cum\, n. [NL. See {Mollusk}.] (Med.)
   A cutaneous disease characterized by numerous tumors, of
   various forms, filled with a thick matter; -- so called from
   the resemblance of the tumors to some molluscous animals.
   --Dunglison.

Source : WordNet®

molluscum
     n : any skin disease characterized by soft pulpy nodules