Pl. areolae [L.]
1. a narrow zone surrounding a central area, e.g. the darkened area surrounding the nipple of the human mammary gland.
2. any minute space or interstice in a tissue.

• placental a. — in the epitheliochorial placenta of the sow areolae develop in the placentation zone. They are shallow cups in the chorion opposite the openings of the endometrial glands in the uterine wall.

Saunders Comprehensive Veterinary Dictionary 3rd Edition. Copyright © 2007 by D.C. Blood, V.P. Studdert and C.C. Gay, Elsevier. All rights reserved.