an area distinct from adjoining parts
an erogenous zone
any of the sections into which an area is divided for a particular purpose
a smokeless zone
an encircling anatomical structure, band of colour, etc
any of five great divisions of the earth's surface with respect to latitude and temperature
in mathematics, a portion of the surface of a sphere included between two parallel planes
a subdivision of a biogeographic region that supports a similar fauna and flora throughout its extent
a distinctive layer of rock or other earth materials
an encircling anatomical structure
archaic a girdle or belt
zonal adj
[Latin zona belt, zone, from Greek zōnē]