English edit

Etymology edit

ultra- +‎ small

Adjective edit

ultrasmall (not comparable)

  1. Extremely or exceedingly small
    • 2009 January 13, John Markoff, “A Breakthrough in Imaging: Seeing a Virus in Three Dimensions”, in New York Times[1]:
      Magnetic resonance force microscopy employs an ultrasmall cantilever arm as a platform for specimens that are then moved in and out of proximity to a tiny magnet.

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