Source : Webster's Revised Unabridged Dictionary (1913)

Papula \Pap"u*la\, n.; pl. {Papul[ae]}. [L.]
   1. (Med.) A pimple; a small, usually conical, elevation of
      the cuticle, produced by congestion, accumulated
      secretion, or hypertrophy of tissue; a papule. --Quain.

   2. (Zo["o]l.) One of the numerous small hollow processes of
      the integument between the plates of starfishes.

Source : WordNet®

papulae
     See {papula}