So minute as not to be discernible
Good and evil, right and wrong, become infinitesimal, ephemeral matters.
The advantages it can offer to its host are, however, infinitesimal when compared with the injury it does it.
In mechanics we are specially concerned with the theory of infinitesimal displacements.
The former was professor of mathematics at Bologna, and published, among other works, a treatise on the infinitesimal calculus.
Let us conceive the zone in question to be divided into infinitesimal rings of equal area.