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)

• Arvicola
• arvicole
• arvicoles
• arvicoline
• arvo
• arvos
• ary
• Aryan
• Aryanise
• Aryanised
• Aryanises
• Aryanising
• Aryanize
• Aryanized
• Aryanizes
• Aryanizing
• Arya Samaj
• aryballoid
• aryballos
• aryballoses
• aryl
• aryls
• arytaenoid
• arytaenoids
• arytenoid