quantifier

noun3

1. •
   A word, such as all or many, that expresses the quantity of a related noun.
2. •
   An operator, such as the universal quantifier (written as ∀) or the existential quantifier (∃), used in predicate calculus to indicate the degree that predicate is true for a specified set.
3. •
   A symbol or symbols in a regular expression indicating the number of characters to be matched.