Usually means: Extremely tiny, smaller than small.
Definitions Related words Mentions
We found 4 dictionaries that define the word ultrasmall:

General (4 matching dictionaries)
  1. ultrasmall: Merriam-Webster
  2. ultrasmall: Collins English Dictionary
  3. ultrasmall: Wordnik
  4. ultrasmall: Wiktionary

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Definitions from Wiktionary (ultrasmall)

▸ adjective:  Extremely or exceedingly small

Similar:
ultratiny, ultraminute, supersmall, ultraminiature, supertiny, ultramicro, ultracompact, ultramicroscale, ultramicroscopical, ultralow, more...

Opposite:
macroscopic, large, big, gigantic, colossal

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Similar:
ultratiny, ultraminute, supersmall, ultraminiature, supertiny, ultramicro, ultracompact, ultramicroscale, ultramicroscopical, ultralow, more...

Opposite:
macroscopic, large, big, gigantic, colossal



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