We found 3 dictionaries that define the word ultratiny:

General (3 matching dictionaries)

1. ultratiny: Merriam-Webster
2. ultratiny: Collins English Dictionary
3. ultratiny: Wiktionary

Definitions from Wiktionary (ultratiny) ▸ adjective:  extremely tiny ▸ Words similar to ultratiny ▸ Usage examples for ultratiny ▸ Idioms related to ultratiny ▸ Wikipedia articles (New!) ▸ Popular nouns described by ultratiny ▸ Words that often appear near ultratiny ▸ Rhymes of ultratiny ▸ Invented words related to ultratiny