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)

• cisterna
• cisternae
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• cistic
• cistron
• cistrons
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• cistus
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• cistvaen
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• cit
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• CIT
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• citadel
• citadels
• cital
• citals
• citation
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• cite
• citeable
• cited