Definition of pericentre in US English:

pericentre

noun

Astronautics Astronomy
  • The point in the path of a celestial object or spacecraft orbiting around a centre at which it is nearest to the centre. Opposed to "apocentre".

Origin

Late 19th century; earliest use found in Simon Newcomb (1835–1909). From peri- + centre [adjective], after perigee, perihelion.

Pronunciation

pericentre

/ˈpɛrɪsɛntə/