[SoothingDave]

Note that “areola” is a different word.

[ken5050]

Potatoe, potato; tomatoe, tomato; aureole; aureola...

[hobbes1]

Technically, you are correct, however, definition 2, clearly states, a ring of light, or color...

So..I would say while the breast obviously deserves it's own special word, your word is malleable enuff to fit the bill;-)