The phrase "a microscopic part" is correct and usable in written English.
It can be used to describe a very small component or element of something larger, often in scientific or technical contexts.
Example: "In the study of cellular biology, researchers often focus on a microscopic part of the cell to understand its functions better."
Alternatives: "a tiny component" or "a minuscule element".
"We have a huge problem with the welfare state in this country, but refugee and immigrant abuse of it is is a very minor, microscopic part of the problem.
This first, light microscopic part of the study is based on a population of 14 layer IV neurons of rat barrel cortex (n = 10 spiny neurons, two basket and two bitufted, putative dendrite-targeting, interneurons) which have been successfully filled with biocytin.
The microscopic part is anisotropic and surrounds the macroscopic part and has the thickness δ, which is small when compared to the size of (Omega_{1}).
Therefore, allometry can be seen as a means to evolutionarily change the transient behavior of several microscopic parts of a system to influence its final macroscopic shape.
What made synthesis so difficult was assembling the microscopic parts in the right order.
Yet Locke, as an empiricist, is deeply skeptical about our ability ever to have access to the exact configurations of the hidden microscopic parts in question.
For instance, one may maintain that the ultimate explanation for our experiences makes reference to the ordinary objects themselves, not just to their microscopic parts.
The reduction would take place by reducing all observable causal relationships to the motions and impacts of the tiny microscopic parts of bodies.[16] In the view of contemporary mechanical philosophers, especially Huygens and Leibniz, Newton's conception of universal gravitation involved an entirely unintelligible action at a distance across empty space.
This model describes an incompressible Navier-Stokes fluid in a composed domain, which contains two different parts, a microscopic one ((Omega_{2})) and a macroscopic one ((Omega_{1})).
