sign of aggregation
noun Mathematics.
any of the signs used to indicate grouping in an algebraic expression: vinculum, bar, or raised horizontal line, 
; a pair of parentheses, (a + b); a pair of brackets, [a + b]; or a pair of braces, {a + b}.
; a pair of parentheses, (a + b); a pair of brackets, [a + b]; or a pair of braces, {a + b}.
Origin of sign of aggregation
First recorded in 1940–45
Words nearby sign of aggregation
sign,
sign away,
sign in,
sign language,
sign manual,
sign of aggregation,
sign of the cross,
sign of the zodiac,
sign off,
sign on,
sign on the dotted line