areolae

/EH1 R IY0 OW0 L AY0/
noun
  1. 1

    The colored circle around a nipple, more exactly known as areola mammae.

  2. 2

    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.

  3. 3

    Any of the small spaces throughout areolar connective tissue.

Source: https://en.wiktionary.org/wiki/areola, https://en.wiktionary.org/wiki/areolae