opening square bracket; left square bracket
Refers specifically to the left or opening square bracket character '['. Used in technical, mathematical, and programming contexts.
In mathematical expressions, you enclose a range with a left square bracket and a right square bracket.
Array indices start with a left square bracket.
The right or closing square bracket ']', counterpart to 左大括弧.
General term for square brackets; 左大括弧 specifies the left one.
Compound of 左 (left) + 大括弧 (square bracket). The term is descriptive and transparent.