Definition of areolas:
(n) :
(anatomy) The circular, darkly pigmented area surrounding a nipple; the areola mammae.
(n) :
(by extension, anatomy) Any small circular area that is different from its immediate environment, such as the colored ring around the pupil of the eye (iris) or an inflamed region surrounding a pimple.
(n) :
(anatomy) Any of the small spaces throughout areolar connective tissue.
(n) :
(botany) Small patches, bearing the spines and glochids characteristic of the stems of cacti.
(n) :
(botany) Any of the small spaces between fibres of the tissues of certain lichens.