che·mo·sphere 
(kēmə-sfîr′, kĕmə-)
(kēmə-sfîr′, kĕmə-)n.
The region of the atmosphere from 30 to 190 kilometers (20 to 120 miles) above the earth's surface, in which photochemical reactions initiated by solar radiation occur.
- dip
- dipeptidase
- dipeptide
- dipetalous
- diphase
- diphasic
- diphenhydramine
- diphenoxylate
- diphenyl
- diphenylamine
- diphenylaminechloroarsine
- diphenylhydantoin
- diphenylketone
- diphosgene
- diphosphate
- diphosphoglyceric acid
- diphosphonate
- diphtheria
- diphtherial
- diphtheric
- diphtheritic
- diphthong
- diphthongal
- diphthongization
- diphthongize