Definition of perisaturnium in English:

perisaturnium

Pronunciation /ˌpɛrɪsəˈtəːnɪəm/

noun

Astronomy
  • The point in the path of a celestial object or spacecraft orbiting (or passing) Saturn at which it is nearest to the planet.

Origin

Mid 19th century; earliest use found in The Penny Cyclopaedia. From peri- + Saturn + scientific Latin -ium, after post-classical Latin perihelium perihelion.