D defs.my
Entry 1 sense Webster, 1913

Counter tenor

/(t?n`?r)/ · Coun·ter ten·or · IPA
01 One of the middle parts in music, between the tenor and the treble; high tenor.
  1. 1.
    One of the middle parts in music, between the tenor and the treble; high tenor.(Mus.)
Phrases & compounds
Counter-tenor clef — the C clef when placed on the third line; -- also called alto clef.