Defn: To pronounce with a hissing sound, like that of the letter s; to mark with a character indicating such pronunciation.

SIBILATION
Sib`i*la"tion, n. Etym: [L. sibilatio.]

Defn: Utterance with a hissing sound; also, the sound itself; a hiss.
He, with a long, low sibilation, stared. Tennyson.

SIBILATORY
Sib"i*la*to*ry, a.

Defn: Hissing; sibilant.

SIBILOUS
Sib"i*lous, a. Etym: [L. sibilus.]

Defn: Having a hissing sound; hissing; sibilant. [R.] Pennant.

SIBYL
Sib"yl, n. Etym: [L. sibylla, Gr.

1. (Class. Antiq.)

Defn: A woman supposed to be endowed with a spirit of prophecy.