angular momentum, \(L\)

https://doi.org/10.1351/goldbook.A00353
Angular momentum, or moment of momentum of a particle about a point is a vector quantity equal to the vector product of the position vector of the particle and its momentum, \(L=r\times p\). For special angular momenta of particles in atomic and molecular physics different symbols are used.
Source:
Green Book,2nd ed., p. 12 (https://www.cintegrado.com.br/site/documentos/green_book_2ed.pdf)