ultramicroscopic

Adjective

Meaning

too small to be seen without an ultramicroscope

Source: WordNet

Synonyms

thin invisible tenuous intangible granular evanescent microscopic infinitesimal imperceptible germinal microcosmic inappreciable molecular atomic embryonic
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Antonyms

titanic large strong heavy distinct visible
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Close letter words and terms

ultramicroporous ultramicroscale ultramicroscope ultramicroscopical ultramicroscopically ultramicroscopy