discant
noun
dis·cant
| \ ˈdi-ˌskant
\
\
less common spelling of descant
1a
: a melody or counterpoint sung above the plainsong of the tenor
b
: the art of composing or improvising contrapuntal part music
also
: the music so composed or improvised
d
: a superimposed counterpoint to a simple melody sung typically by some or all of the sopranos
2
: discourse or comment on a theme