sibilant sibilant /ˈsɪbɪlənt/

adjective

1. Of speech sounds produced by forcing air through a constricted passage (as 'f', 's', 'z', or 'th' in both 'thin' and 'then')  ( continuant , fricative , sibilant , spirant , strident )
   of speech sounds produced by forcing air through a constricted passage (as 'f', 's', 'z', or 'th' in both 'thin' and 'then')
   

noun

1. A consonant characterized by a hissing sound (like s or sh)  ( sibilant , sibilant consonant )
   a consonant characterized by a hissing sound (like s or sh)