Source : Webster's Revised Unabridged Dictionary (1913)

Susurrous \Su*sur"rous\, a. [L. susurrus.]
   Whispering; rustling; full of whispering sounds. [R.]

Source : WordNet®

susurrous
     adj : characterized by soft sounds; "a murmurous brook"; "a
           soughing wind in the pines"; "a slow sad susurrous
           rustle like the wind fingering the pines"- R.P.Warren
           [syn: {murmurous}, {rustling}, {soughing}]