Source : Webster's Revised Unabridged Dictionary (1913)

Mohair \Mo"hair`\, n. [F. moire, perh. from Ar. mukhayyar a kind
   of coarse camelot or haircloth; but prob. fr. L. marmoreus of
   marble, resembling marble. Cf. {Moire}, {Marble}.]
   The long silky hair or wool of the Angora goat of Asia Minor;
   also, a fabric made from this material, or an imitation of
   such fabric.

Source : WordNet®

mohair
     n : fabric made with yarn made from the silky hair of the Angora
         goat