The Collaborative International Dictionary of English v.0.48:
agelong \age"long\ ([=a]j"l[o^]ng), a. lasting through all time; unending; as, The agelong struggle for freedom. Syn: unending [WordNet 1.5]WordNet (r) 3.0 (2006):
agelong adj 1: lasting through all time; "agelong struggle for freedom"