Technical term in logic and linguistics for an expression that indicates quantity, such as 'all' or 'some'. Compare with 量記号 (りょうきごう), which refers to a symbol representing a physical quantity.
See also: 量記号 (りょうきごう)
In predicate logic, ∀ and ∃ are called quantifiers.
Quantifiers in natural language include 'all' and 'some'.
Formed from 量化, “quantification,” and 子, a suffix used for an operator or formal element; it was coined as the logical term for a quantifier.