We found one dictionary that defines the word bizonals:

Art (1 matching dictionary)

1. Glossary of Stamp Collecting Terms (No longer online)

(Note: See bizonal as well.)

Definitions from Wiktionary (bizonal) ▸ adjective:  Having or involving two zones. ▸ Also see bizonal ▸ Words similar to bizonals ▸ Usage examples for bizonals ▸ Idioms related to bizonals ▸ Wikipedia articles (New!) ▸ Popular nouns described by bizonals ▸ Words that often appear near bizonals ▸ Rhymes of bizonals ▸ Invented words related to bizonals