surface density, \(\rho_{\text{A}}\), \(\rho_{\text{S}}\)

https://doi.org/10.1351/goldbook.S06167
Mass divided by area.
Sources:
Green Book, 2nd ed., p. 12 [Terms] [Book]
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 994 [Terms] [Paper]