Source : Webster's Revised Unabridged Dictionary (1913)

Phyllodium \Phyl*lo"di*um\, n.; pl. {Phyllodia}. [NL., fr. Gr. ?
   leaflike; ? leaf + ? form.] (Bot.)
   A petiole dilated into the form of a blade, and usually with
   vertical edges, as in the Australian acacias.