Search Result for "apoapsis": 
Wordnet 3.0

NOUN (1)

1. (astronomy) the point in an orbit farthest from the body being orbited;
[syn: apoapsis, point of apoapsis]



WordNet (r) 3.0 (2006):

apoapsis
    n 1: (astronomy) the point in an orbit farthest from the body
         being orbited [syn: apoapsis, point of apoapsis] [ant:
         periapsis, point of periapsis]