Source : Webster's Revised Unabridged Dictionary (1913)

Continuant \Con*tin"u*ant\, a.
   Continuing; prolonged; sustained; as, a continuant sound. --
   n. A continuant sound; a letter whose sound may be prolonged.

Source : WordNet®

continuant
     n : consonant articulated by constricting (but not closing) the
         vocal tract [syn: {continuant consonant}] [ant: {stop
         consonant}]