Source : Webster's Revised Unabridged Dictionary (1913)

Propodium \Pro*po"di*um\, n.; pl. {Propodia}. [NL. See
   {Propodiale}.] (Zo["o]l.)
   (a) The anterior portion of the foot of a mollusk.
   (b) The segment which forms the posterior part of the thorax
       of a hymenopterous insect. [Written also {propodeum}.]