co·en·zyme 
(kō-ĕnzīm′)
(kō-ĕnzīm′)n.
An organic substance that reversibly combines with a specific protein, the apoenzyme, and with a substrate to form an active enzyme system.
co′en·zy·matic (-zə-mătĭk) adj.
co·en′zy·mati·cal·ly adv.
- individually
- individual retirement account
- individuate
- individuation
- indivisibility
- indivisible
- indivisibleness
- indivisibly
- Indo-
- Indo-Aryan
- Indochina
- Indochinese
- indocile
- indocility
- indoctrinate
- indoctrination
- Indo-European
- Indo-Europeanist
- Indo-European root: ad-
- Indo-European root: ag-
- Indo-European root: agh-
- Indo-European root: agro-
- Indo-European root: aik-
- Indo-European root: aim-
- Indo-European root: ais-