zona zo·na (zō'nə)
n. pl. zo·nae (-nē)
An encircling or beltlike anatomical structure. Also called segment, zone.
|(anatomy) any encircling or beltlike structure [syn: zone]|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|