Source : Webster's Revised Unabridged Dictionary (1913)

Forget-me-not \For*get"-me-not`\, n. [Cf. G. vergissmeinnicht.]
   (Bot.)
   A small herb, of the genus {Myosotis} ({M. palustris},
   {incespitosa}, etc.), bearing a beautiful blue flower, and
   extensively considered the emblem of fidelity.

   Note: Formerly the name was given to the {Ajuga
         Cham[ae]pitus}.

Source : WordNet®

forget-me-not
     n : small perennial herb having bright blue or white flowers
         [syn: {mouse ear}, {Myosotis scorpiodes}]