Sepia (?), n.; pl. E. Sepias (#), L. Sepiæ (#). [L., fr. Gr. &unr_;&unr_;&unr_; the cuttlefish, or squid.] 1. (Zoöl.) (a) The common European cuttlefish. (b) A genus comprising the common cuttlefish and numerous similar species. See Illustr. under Cuttlefish.
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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.
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Sepia drawing or Sepia picture, a drawing in monochrome, made in sepia alone, or in sepia with other brown pigments.
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