The Collaborative International Dictionary of English v.0.48:

Mademoiselle \Ma`de*moi`selle"\, n.; pl. Mesdemoiselles. [F.,
   fr. ma my, f. of mon + demoiselle young lady. See Damsel.]
   1. A French title of courtesy given to a girl or an unmarried
      lady, equivalent to the English Miss. --Goldsmith.
      [1913 Webster]

   2. (Zool.) A marine food fish (Sciaena chrysura), of the
      Southern United States; -- called also yellowtail, and
      silver perch.
      [1913 Webster]

WordNet (r) 3.0 (2006):

mademoiselle
    n 1: small silvery drumfish often mistaken for white perch;
         found along coasts of United States from New York to Mexico
         [syn: silver perch, mademoiselle, Bairdiella
         chrysoura]