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The Collaborative International Dictionary
Propodium

Propodium \Pro*po"di*um\, n.; pl. Propodia. [NL. See Propodiale.] (Zo["o]l.)

  1. The anterior portion of the foot of a mollusk.

  2. The segment which forms the posterior part of the thorax of a hymenopterous insect. [Written also propodeum.]

Wiktionary
propodium

n. 1 (context zoology English) The anterior portion of the foot of a mollusk. 2 (context zoology English) The first abdominal segment, when it forms a unit with the thorax of a hymenopterous insect in the group Apocrita.