The Collaborative International Dictionary of English v.0.48:

Sepia \Se"pi*a\, n.; pl. E. Sepias, L. Sepiae. [L., fr. Gr.
   ??? the cuttlefish, or squid.]
   1. (Zool.)
      (a) The common European cuttlefish.
      (b) A genus comprising the common cuttlefish and numerous
          similar species. See Illustr. under Cuttlefish.
          [1913 Webster]

   2. A pigment prepared from the ink, or black secretion, of
      the sepia, or cuttlefish. Treated with caustic potash, it
      has a rich brown color; and this mixed with a red forms
      Roman sepia. Cf. India ink, under India.
      [1913 Webster]

   Sepia drawing or Sepia picture, a drawing in monochrome,
      made in sepia alone, or in sepia with other brown
      pigments.
      [1913 Webster]