areola areola /əˈriələ/

noun

1. Small circular area such as that around the human nipple or an inflamed area around a pimple or insect bite  ( areola , ring of color [American] , ring of colour [Canadian, British] )
   small circular area such as that around the human nipple or an inflamed area around a pimple or insect bite
   
   
2. Small space in a tissue or body part such as the area between veins on a leaf or an insect's wing  ( areola )
   small space in a tissue or body part such as the area between veins on a leaf or an insect's wing