Source : Webster's Revised Unabridged Dictionary (1913)

Polycotyledon \Pol`y*cot`y*le"don\, n. [Poly- + cotyledon: cf.
   F. polycotyl['e]done.] (Bot.)
   A plant that has many, or more than two, cotyledons in the
   seed. -- {Pol`y*cot`y*led"on*ous}, a.