From The Collaborative International Dictionary of English v.0.48 [gcide]:
Appetence \Ap"pe*tence\, n. [Cf. F. app['e]tence. See
Appetency.]
A longing; a desire; especially an ardent desire; appetite;
appetency.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
appetence
n 1: a feeling of craving something; "an appetite for life";
"the object of life is to satisfy as many appetencies as
possible"- Granville Hicks [syn: appetite, appetency,
appetence]