opening brace
Refers to the left curly bracket character '{' used in programming, mathematics, and markup.
When writing code, pay attention to the position of the opening brace.
The closing brace '}', counterpart to 左中括弧.
General term for curly braces; 左中括弧 specifically means the left one.
Compound of 左 (left), 中 (middle), and 括弧 (bracket). The term describes the left-facing curly bracket character.