Meaning of ULTRAMICROSCOPIC in English

ULTRAMICROSCOPIC

[ul.tra.mi.cro.scop.ic] also ul.tra.mi.cro.scop.i.cal adj [ISV] (1870) 1: too small to be seen with an ordinary microscope

2: of or relating to an ultramicroscope -- ul.tra.mi.cro.scop.i.cal.ly adv

Merriam-Webster English vocab.      Английский словарь Merriam Webster.