sign of aggregation

noun

, Mathematics.

1. 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 }.

Word History and Origins

Origin of sign of aggregation¹

First recorded in 1940–45

Example Sentences

Under a high power the first sign of aggregation is the appearance of a cloud, and soon afterwards of extremely fine granules, in the homogeneous purple fluid within the cells; and this apparently is due to the union of molecules of protoplasm.

From Project Gutenberg