electric dipole moment, \(p\)

Vector quantity, the vector product of which with the electric field strength, E, of a homogeneous field is equal to the torque. T = p x E. The direction of the dipole moment is from the negative to the positive charge.
Green Book, 2nd ed., p. 24 (https://goldbook.iupac.org/files/pdf/green_book_2ed.pdf)