common denominator

common denominator noun
plural common denominators
common denominator
noun
plural common denominators
Britannica Dictionary definition of COMMON DENOMINATOR
[count]
1 
mathematics : a number that can be divided by each of the denominators of a group of fractions
2 
: something (such as a feature or quality) that is shared by all the members of a group of people or things
— see also lowest common denominator