submicroscopic

listen to the pronunciation of submicroscopic
الإنجليزية - التركية
mikroskopla görülemeyecek kadar küçük
(Tıp) Mikroskopla görülemeyecek derecede ufak olan
الإنجليزية - الإنجليزية
Smaller than microscopic, too small to be seen even with a microscope
{s} not visible under a microscope, too small to be seen under a microscope