Dictionary.com
definitions

apocynthion

noun
  1. the point at which a spacecraft in lunar orbit is farthest from the moonCompare apolune, pericynthion

Word Origin for apocynthion

C20: from apo- (away) + cynthion, from Latin Cynthia goddess of the moon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012