D defs.my
Entry 1 sense Webster, 1913

Sibilance

· Sib·i·lance · IPA
01 n. The quality or state of being sibilant; sibilation.
  1. 1.
    The quality or state of being sibilant; sibilation.
    “Milton would not have avoided them for their sibilancy, he who wrote . . . verses that hiss like Medusa's head in wrath.” Lowell.