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Of, characterized by, or producing a hissing sound like that of (s) or (sh): the sibilant consonants; a sibilant bird call.
A sibilant speech sound, such as English (s), (sh), (z), or (zh).

[Latin sībilāns, sībilant-, present participle of sībilāre, to hiss.]

sib′i·lance, sib′i·lan·cy n.
sib′i·lant·ly adv.

sibilancy, sibilance

the state or quality of a hissing sound. — sibilant, adj.
See also: Sound
References in classic literature ?
softly the information that there was a noise he did not know; and Nalasu, with different sibilances, would hiss to him to stand still, to whuff more softly, or to keep silent, or to come to him noiselessly, or to go into the bush and investigate the source of the strange noise, or, barking loudly, to rush and attack it.
The details, the texture and even the sibilance is beautiful and rich.
SIBILANCE has so far saved her best efforts for all-weather surfaces and she can make the most of a return to the Polytrack in the Bet toteexacta At betfred.
Chelmsford City Racecourse, where Sibilance can win today
As it plumbs the narrow well of itself, the poem amasses sonic riches--the /in/s of plummeting-rings-sinking, the slippery sibilance of bottomlessness's double suffix, the reverb of there-where and silver-ever--and accrues other interest.
In the richness of these lines' carefully distributed and chiming vowels, the gentle sibilance, and the sinuous rhythm, the extravagance of the language matches the gratuitous waste of the gesture.
Robin Fox emphasizes "the hissing "s" sounds of the little serpents" (224), and calls the reader's attention to this alliteration, which strengthens this symbolic representation through the effect of sibilance.
It seems a farewell to Prague; the beauty in Josef's observation is not only in the image but also in the euphony of the metaphor, in the play between the plosive "b" alliteration and the melancholy sibilance.
alliteration, between sibilance and masculine rhyme.
The sigmatism and the hissing sibilance of this line anticipate the explicit mention of the serpent ([TEXT NOT REPRODUCIBLE IN ASCII], 480) from which she saved him only a few lines later.
Sybil" also echoes the words sibilance and syllables--teasing out ideas of wordplay, repetition and substitution through multiplication and sleight of sound, rhyming and chiming words.