coherent system of units of measurement 

of measurement
https://doi.org/10.1351/goldbook.C01134
System of units of measurement in which all of the derived units are coherent.
Source:
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 966 [Terms] [Paper]