"(". ASCII character 40. Common names: left paren left parenthesis left Open paren (")" = thesis) Open paren Open parenthesis left parenthesis left banana. Rare: so (")" = already) lparen ITU-T: Opening parenthesis Open round bracket, left round bracket, INTERCAL: wax (")" = wane) parenthisey (")" = unparenthisey) left ear. Paired with right parenthesis (")"). (1995-03-06)