zo·na·tion 
(zō-nāshən)
(zō-nāshən)n.
1. Arrangement or formation in zones; zonate structure.
2. Ecology The distribution of organisms in biogeographic zones.
- deontic
- deontological
- deontologically
- deontologist
- deontology
- deorbit
- deoxidization
- deoxidize
- deoxidizer
- deoxy-
- deoxycorticosterone
- deoxygenate
- deoxygenation
- deoxyribonuclease
- deoxyribonucleic acid
- deoxyribonucleoside
- deoxyribonucleotide
- deoxyribose
- dep.
- depart
- departed
- department
- departmental
- departmentalization
- departmentalize