The Collaborative International Dictionary of English v.0.48:

cambric \cam"bric\ (k[a^]m"br[i^]k), n. [OE. camerike, fr.
   Cambrai (Flemish Kamerik), a city of France (formerly of
   Flanders), where it was first made.]
   1. A fine, thin, and white fabric made of flax or linen.
      [1913 Webster]

            He hath ribbons of all the colors i' the rainbow; .
            . . inkles, caddises, cambrics, lawns. --Shak.
      [1913 Webster]

   2. A fabric made, in imitation of linen cambric, of fine,
      hardspun cotton, often with figures of various colors; --
      also called cotton cambric, and cambric muslin.
      [1913 Webster]

WordNet (r) 3.0 (2006):

cambric
    n 1: a finely woven white linen