Quiescent \Qui*es"cent\, n. (Gram.)
   A silent letter. --M. Stuart.
   
[1913 Webster]

Quiescent \Qui*es"cent\, a. [L. quiescens, -entis, p. pr. of
   quiescere: cf. F. quiescent. See {Quiesce}.]
   1. Being in a state of repose; at rest; still; not moving;
      as, a quiescent body or fluid.
      
[1913 Webster]


   2. Not ruffed with passion; unagitated; not in action; not
      excited; quiet; dormant; resting.
      
[1913 Webster]


            In times of national security, the feeling of
            patriotism . . . is so quiescent that it seems
            hardly to exist.                      --Prof.
                                                  Wilson.
      
[1913 Webster]


   3. (Gram.) Not sounded; silent; as, y is quiescent in "day"
      and "say."
      
[1913 Webster]