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.
- hydrometeorology
- hydrometer
- hydrometric
- hydrometrical
- hydrometrically
- hydrometry
- hydromorphone
- hydronaut
- hydronephrosis
- hydronic
- hydronium
- hydropath
- hydropathic
- hydropathical
- hydropathist
- hydropathy
- hydrophane
- hydrophanous
- hydrophile
- hydrophilic
- hydrophilicity
- hydrophilous
- hydrophily
- hydrophobia
- hydrophobic