Definition of areola noun from the Oxford Advanced Learner's Dictionary

 

areola

 noun
noun
BrE BrE//əˈriːələ//
 
; NAmE NAmE//əˈriːələ//
 
(pl. areolae
BrE BrE//əˈriːəliː//
 
; NAmE NAmE//əˈriːəliː//
 
)
(anatomy)
 
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the round area of skin around the nipple Word Origin mid 17th cent. (in the sense ‘small space or crack’): from Latin, literally ‘small open space’, diminutive of area, literally ‘vacant piece of level ground’.
See the Oxford Advanced American Dictionary entry: areola