zon·al soil 
(zōnəl)
(zōnəl)n.
Soil that has well-defined features that are characterized by the weather it is exposed to and the vegetation that grows there.
- exterior
- exterior angle
- exteriority
- exteriorize
- exteriorly
- exterminate
- extermination
- exterminative
- exterminator
- exterminatory
- extern
- external
- external auditory canal
- external capsule
- external-combustion engine
- external ear
- externalism
- externalist
- externality
- externalization
- externalize
- externally
- external phase
- external respiration
- externe