Adjective
aprotic (comparative more aprotic, superlative most aprotic)
(chemistry, especially of a solvent) That does not contain (or cannot donate) a hydrogen ion (proton).
Another distinction is whether their molecules can form hydrogen bonds ( protic and aprotic solvents). Source: Internet
Physical properties of common solvents Properties table of common solvents The solvents are grouped into non-polar, polar aprotic, and polar protic solvents and ordered by increasing polarity. Source: Internet
Polar protic and polar aprotic Solvents with a dielectric constant (more accurately, relative static permittivity ) greater than 15 (i.e. polar or polarizable) can be further divided into protic and aprotic. Source: Internet
The following table shows that the intuitions from "non-polar", "polar aprotic" and "polar protic" are put numerically – the "polar" molecules have higher levels of δP and the protic solvents have higher levels of δH. Source: Internet