A-rē'ō-lā, n.

n.; pl. A-RĒ'Ō-LÆ. [Fr. aréole, Lat. areola, dim. of area, q. v.]

1. An interstice or small space, as between the cracks of the surface in certain crustaceous lichens; or as between the fibers composing organs or vessels that interlace; or as between the divisions of an insect’s wing.
2. The colored ring around the nipple, and also around certain vesicles, pustules, &c., as of small-pox and cow-pox. Dunglison.