cluster centroid

https://doi.org/10.1351/goldbook.11424
The geometric center of a cluster, often exemplified as the object that is closest to the center.
Source:
PAC, 2016, 88, 239. 'Glossary of terms used in computational drug design, part II (IUPAC Recommendations 2015)' on page 243 (https://doi.org/10.1515/pac-2012-1204)