From The Collaborative International Dictionary of English v.0.48 :
Satiation \Sa`ti*a"tion\, n.
Satiety.
[1913 Webster]
From WordNet (r) 3.0 (2006) :
satiation
n 1: the state of being satisfactorily full and unable to take
on more [syn: repletion, satiety, satiation]
2: the act of achieving full gratification