What is "areolet"

Areolet \A*re"o*let\, n. [Dim. of L. areola.] (Zo["o]l.) A small inclosed area; esp. one of the small spaces on the wings of insects, circumscribed by the veins.

n. (context zoology English) A small enclosed area, especially one of the small spaces on the wings of insects, circumscribed by the veins.