submicroscopic
sub·mi·cro·scop·ic
adj \ˌsəb-ˌmī-krə-ˈskäp-ik\Definition of SUBMICROSCOPIC
: too small to be seen in an ordinary light microscope <submicroscopic particles> <submicroscopic organization of a bacterium>—compare macroscopic, microscopic 2, ultramicroscopic 1
—sub·mi·cro·scop·i·cal·ly \-i-k(ə-)lē\ (audio pronunciation) adverb
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