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Webster 1913 Edition

Adj.

[Pref.

bi-

pupil

(of the eye).]

(Zool.)

Having an eyelike spot on the wing, with two dots within it of a different color, as in some butterflies.

bipupillate ‎(not comparable)

(zoology) Having an eyespot on the wing, with two dots within it of a different colour, as in some butterflies.