derived non-coherent unit

https://doi.org/10.1351/goldbook.D01613
A unit constructed from base units and numerical factors, which may be named and symbolized, e.g. mg, mol l-1.
Source:
PAC, 1979, 51, 2451. 'Quantities and Units in Clinical Chemistry' on page 2461 (https://doi.org/10.1351/pac197951122451)