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)

• trapezius muscles
• trapezohedra
• trapezohedral
• trapezohedron
• trapezohedrons
• trapezoid
• trapezoidal
• trapezoids
• trapfall
• trapfalls
• traping
• trap-ladder
• traplike
• trapline
• traplines
• trappean
• trapped
• trapper
• trappers
• trappier
• trappiest
• trappiness
• trappinesses
• trapping
• trappings