ultratiny

adjective
ul·​tra·​ti·​ny | \ ˌəl-trə-ˈtī-nē How to pronounce ultratiny (audio) \

Definition of ultratiny

: extremely small or diminutive : extremely tiny Two years ago, some scientists claimed to have found a new class of ultratiny microbes that others argued were too small to be real.— J. Travis

First Known Use of ultratiny

1908, in the meaning defined above

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The first known use of ultratiny was in 1908

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