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Webster 1913 Edition

Adj.

[L.

sibilans

-antis

, p. pr. of

sibilare

to hiss: cf. F.

sibilant

Making a hissing sound; uttered with a hissing sound; hissing;

as, s, z, sh, and zh, are

sibilant

elementary sounds

–

Noun.

A sibiliant letter.

Adj.

[L. sibilo, to hiss.] Hissing; making a hissing sound. S and z are called sibilant letters.

Noun.

A letter that is uttered with a hissing of the voice; as s and z.