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Pterostigma

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Pterostigma \Pter`o*stig"ma\, n.; pl. {Pterostigmata}. [NL., fr.
   Gr. ? wing + ?, ?, a mark.] (Zo["o]l.)
   A thickened opaque spot on the wings of certain insects.
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