资料来源 : Webster's Revised Unabridged Dictionary (1913)

Prophragma \Pro*phrag"ma\, n.; pl. {Prophragmata}. [NL., fr. Gr.
   ? before + ?, ?, fence, screen. ] (Zo["o]l.)
   An internal dorsal chitinous process between the first two
   divisions of the thorax of insects.