'Quiescency' definitions:

Definition of 'quiescency'

noun

A state of quiet (but possibly temporary) inaction; "the volcano erupted after centuries of dormancy" [syn: dormancy, quiescence, quiescency]

noun

Quiet and inactive restfulness [syn: quiescence, quiescency, dormancy, sleeping]

From: 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]