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)

• let-ups
• let well alone
• leu
• leuc-
• leucaemia
• leucaemic
• leucaemogen
• leucaemogenesis
• leucaemogenic
• leucaemogens
• leuch
• leuchaemia
• leuchen
• leucin
• leucine
• leucines
• leucins
• Leuciscus
• leucistic
• leucite
• leucites
• leucitic
• leucitohedra
• leucitohedron
• leucitohedrons