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)

• brassiness
• brassinesses
• brassière
• brassières
• brass monkey
• brass monkeys
• brass neck
• brass necks
• brass off
• brass plate
• brass plates
• brass rubber
• brass rubbers
• brass rubbing
• brass rubbings
• brass someone off
• brass tacks
• brassware
• brasswares
• brassy
• brast
• brat
• bratchet
• bratchets
• bratling