Main Entry: sub·mi·cro·scop·ic Pronunciation: "s&b-"mI-kr&-'skäp-ik Function: adjective : too small to be seen in anordinary light microscope <submicroscopic particles> <submicroscopic organization of a bacterium> —compare MACROSCOPIC, MICROSCOPIC 2, ULTRAMICROSCOPIC 1 —sub·mi·cro·scop·i·cal·ly/-i-k(&-)lE/adverb