Deoxy- Definition

dēäksī, dēäksə
prefix
Denoting a molecule containing less oxygen than another to which it is closely related.
Deoxycorticosterone.
American Heritage
affix
Containing less oxygen than its parent compound.
Deoxyribose.
Webster's New World
adjective

(chemistry) Describing any compound formally derived from another by replacement of a hydroxy group by a hydrogen atom.

Wiktionary