dielectric polarization, \(P\)

https://doi.org/10.1351/goldbook.D01698
The difference between the electric displacement vector and the product of the electric field strength with the permittivity of vacuum, P = D- ɛ 0 E.
Source:
Green Book, 2nd ed., p. 14 (https://dev.goldbook.iupac.org/files/pdf/green_book_2ed.pdf)