barycentre
Noun
Meaning
barycentre (plural barycentres)
(mathematics, physics, astronomy) The point at the centre of a system; an average point, weighted according to mass or other attribute. The term is usually used in astronomy for the centre of mass about which a system rotates, for example, the moon and the earth rotate about a common point within the earth but not near the centre. Jupiter and the Sun rotate about a common point just outside the surface of the Sun.
Synonyms
focus
axis
emphasis
priority
focusing
pivot
centroid
center of mass
center of gravity
centre of gravity
barycenter
mass center