Source : Webster's Revised Unabridged Dictionary (1913)

Pecten \Pec"ten\, n. [L. pecten, -inis, a comb, a kind of
   shellfish. See {Pectinate}.]
   1. (Anat.)
      (a) A vascular pigmented membrane projecting into the
          vitreous humor within the globe of the eye in birds,
          and in many reptiles and fishes; -- also called
          {marsupium}.
      (b) The pubic bone.

   2. (Zo["o]l.) Any species of bivalve mollusks of the genus
      {Pecten}, and numerous allied genera (family
      {Pectinid[ae]}); a scallop. See {Scallop}.

   3. (Zo["o]l.) The comb of a scorpion. See {Comb}, 4
      (b) .