adj.
1.of speech sounds produced by forcing air through a constricted passage (as `f', `s', `z', or `th' in both `thin' and `then') sibilant n.
1.a consonant characterized by a hissing sound (like s or sh)
Idiom of the Day
split (some people) up or split up (some people)
to separate two or more people from one another
The teacher had to split the two boys up because they were fighting.