The Collaborative International Dictionary of English v.0.48:

Chimere \Chi*mere"\, n. [OF. chamarre., F. simarre (cf. It.
   zimarra), fr. Sp. chamarra, zamarra, a coat made of
   sheepskins, a sheepskin, perh. from Ar. samm[=u]r the
   Scythian weasel or marten, the sable. Cf. Simarre.]
   The upper robe worn by a bishop, to which lawn sleeves are
   usually attached. --Hook.
   [1913 Webster]