perilune definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
the orbital point nearest to the moon of an artificial satellite launched from, and in orbit around, the moon
Origin: peri- plush lune
perilune - Science Definition
The point at which an object orbiting the Moon, such as an artificial satellite, is closest to the Moon's center.