We found one dictionary that defines the word dialogue balloon:

General (1 matching dictionary)

1. dialogue balloon: Wiktionary

Definitions from Wiktionary (dialogue balloon) ▸ noun:  Synonym of speech bubble ▸ Words similar to dialogue balloon ▸ Usage examples for dialogue balloon ▸ Idioms related to dialogue balloon ▸ Wikipedia articles (New!) ▸ Words that often appear near dialogue balloon ▸ Rhymes of dialogue balloon ▸ Invented words related to dialogue balloon