One of the serine proteases of the coagulation system, whose absence leads to hemophilia.

A measure reflecting the average number of citations to recent articles published in an academic journal, used as an approximation of the relative importance of a journal within its field.

(quantum mechanics) A normalized complex number, considered as, say, the scalar coefficient of a ket.

(economics) The system or infrastructure for economic exchange within which factors of production (such as labor, materials, or capital) are purchased or sold.

(marine chemistry) A measure of how readily ocean waters will uptake atmospheric carbon dioxide.

(category theory) Said of a morphism: to be equal to a composition of two morphisms, one of which is the given morphism (that is being said to be "factored through").

plural of factor analysis

(uncountable, statistics) A statistical method used to describe variability among observed correlated variables in terms of one or more unobserved variables (called factors).

(military, slang) The level of stress and/or adrenaline in a dangerous situation.

(slang) The element of a situation or problem that should be obvious but may go unnoticed through human error.