quiescency

from WordNet (r) 3.0 (2006)

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}]

from The Collaborative International Dictionary of English v.0.48

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]