We found one dictionary that defines the word parenthetical expressions:

General (1 matching dictionary)

1. parenthetical expressions: Vocabulary.com

(Note: See parenthetical_expression as well.)

Definitions from WordNet (parenthetical expression) ▸ noun:  an expression in parentheses ▸ Also see parenthetical_expression ▸ Words similar to parenthetical expressions ▸ Usage examples for parenthetical expressions ▸ Idioms related to parenthetical expressions ▸ Wikipedia articles (New!) ▸ Words that often appear near parenthetical expressions ▸ Rhymes of parenthetical expressions ▸ Invented words related to parenthetical expressions