From The Collaborative International Dictionary of English v.0.48 [gcide]:
Quiescence \Qui*es"cence\, Quiescency \Qui*es"cen*cy\, n. [L.
quiescentia, fr. quiescens, p. pr.; cf. F. quiestence. See
Quiesce.]
The state or quality of being quiescent. "Quiescence, bodily
and mental." --H. Spencer.
[1913 Webster]
Deeds will be done; -- while be boasts his quiescence.
--R. Browning.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
quiescency
n 1: a state of quiet (but possibly temporary) inaction; "the
volcano erupted after centuries of dormancy" [syn:
dormancy, quiescence, quiescency]
2: quiet and inactive restfulness [syn: quiescence,
quiescency, dormancy, sleeping]