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Webster's Dictionary (1865)

Pĕc'ten, n.

noun

n. [Lat. pecten, pectinis, a comb, a kind of shell-fish.]

  1. (Ornith.) A vascular membrane on the eyes of birds.
  2. (Zoöl.) A genus of bivalves; the scallop.

Eng. Cyc.

A scallop shell is shown with its fan-shaped ribs and two valves spread open.
Pecten (Jacobæus). (2.)