Source : Webster's Revised Unabridged Dictionary (1913)

Adonic \A*don"ic\, a. [F. adonique: cf. L. Adonius.]
   Relating to Adonis, famed for his beauty. -- n. An Adonic
   verse.

   {Adonic verse}, a verse consisting of a dactyl and spondee
      (-- [crescent] [crescent] | -- --).