cofactor

noun co·fac·tor \ ˈkō-ˌfak-tər \

Definition of cofactor

1 : the signed minor of an element of a square matrix or of a determinant with the sign positive if the sum of the column number and row number of the element is even and with the sign negative if it is odd
2 : a substance that acts with another substance to bring about certain effects; especially : coenzyme
3 : something (such as diet or a virus) that acts with or aids another factor in causing disease

Recent Examples of cofactor from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cofactor.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of cofactor

1885

in the meaning defined at sense 1

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Medical Dictionary

cofactor

noun co·fac·tor \ ˈkō-ˌfak-tər \

medical Definition of cofactor

1 : a substance that acts with another substance to bring about certain effects; especially : coenzyme
2 : something (as a diet or virus) that acts with or aids another factor in causing disease
  • Infection with the HPV virus is an important cofactor in cervical cancer, but very few people infected with HPV will ever get cervical cancer.
  • —Elissa MendenhallMotheringMay/June 2007

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