submicroscopic

As adjectives the difference between submicroscopic and ultramicroscopic

is that submicroscopic is smaller than microscopic; too small to be seen even with a microscope while ultramicroscopic is too small to be seen with an ordinary microscope.

As adjectives the difference between nanoscopic and submicroscopic

is that nanoscopic is having a scale expressed in nanometers while submicroscopic is smaller than microscopic; too small to be seen even with a microscope.

Microrcopic is likely misspelled.

Microrcopic has no English definition.

As an adjective submicroscopic is

smaller than microscopic; too small to be seen even with a microscope.

As adjectives the difference between submacroscopic and submicroscopic

is that submacroscopic is at a scale smaller than macroscopic while submicroscopic is smaller than microscopic; too small to be seen even with a microscope.

As an adjective submicroscopic

is smaller than microscopic; too small to be seen even with a microscope.

As a noun micella is

(obsolete|biology) a supposed submicroscopic particle that formed part of a biological organism.