cofactor /kō-fakˈtər/

1. A factor which occurs along with other factors in multiplication
2. A nonprotein organic molecule or a metallic ion that binds with an enzyme and is essential to the enzyme's activity (biology)

• dog-crabs
• dog-daisies
• dog-daisy
• dog days
• doge
• dog-ear
• dog-eared
• dog-ears
• dog eat dog
• dog-eat-dog
• douceness
• doucenesses
• doucepere
• douceperes
• doucer
• doucest
• doucet
• doucets
• douceur
• douceurs
• douche
• douche bag
• douched
• douches
• douche écossaise