ultramicroscopic

adjective

ul·​tra·​mi·​cro·​scop·​ic ˌəl-trə-ˌmī-krə-ˈskä-pik 

variants or less commonly ultramicroscopical

ˌəl-trə-ˌmī-krə-ˈskä-pi-kəl 

1

: too small to be seen with an ordinary microscope

2

: of or relating to an ultramicroscope

ultramicroscopically

ˌəl-trə-ˌmī-krə-ˈskä-pi-k(ə-)lē 

adverb

Word History

Etymology

International Scientific Vocabulary

First Known Use

1870, in the meaning defined at sense 1

Medical Definition

ultramicroscopic

adjective

ul·​tra·​mi·​cro·​scop·​ic -ˌmī-krə-ˈskäp-ik 

variants also ultramicroscopical

-i-kəl 

1

: too small to be seen with an ordinary microscope compare macroscopic, microscopic sense 2, submicroscopic

2

: of or relating to an ultramicroscope

ultramicroscopically

-i-k(ə-)lē 

adverb