adj.
Pronunciation: - ˌ m ī -kr ə - ' skä-pik
Variant: also ul · tra · mi · cro · scop · i · cal \ -pi-k ə l \
Function: adjective
Etymology: International Scientific Vocabulary
Date: 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 \ -pi-k( ə -)l ē \ adverb