e·co·sphere 
(ēkō-sfîr′, ĕkō-)
(ēkō-sfîr′, ĕkō-)n.
The regions of the universe, especially on the earth, that are capable of supporting life; the biosphere.
- dipeptide
- dipetalous
- diphase
- diphasic
- diphenhydramine
- diphenoxylate
- diphenyl
- diphenylamine
- diphenylaminechloroarsine
- diphenylhydantoin
- diphenylketone
- diphosgene
- diphosphate
- diphosphoglyceric acid
- diphosphonate
- diphtheria
- diphtherial
- diphtheric
- diphtheritic
- diphthong
- diphthongal
- diphthongization
- diphthongize
- diphycercal
- diphycercy