entitic

https://doi.org/10.1351/goldbook.E02145
Modifier used to denote divided by number of entities.
Source:
PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 972 (https://doi.org/10.1351/pac199668040957)