The Collaborative International Dictionary of English v.0.48:
Apogean \Ap`o*ge"an\, a. Connected with the apogee; as, apogean (neap) tides, which occur when the moon has passed her apogee. [1913 Webster]WordNet (r) 3.0 (2006):
apogean adj 1: relating to or characteristic of an apogee; "apogean tides occur when the moon is at the apogee of its orbit"