Noun
English Wikipedia has an article on:countersubjectWikipedia
countersubject (plural countersubjects)
(music) The secondary melody in contrapuntal music
If this new material is reused in later statements of the subject, it is called a countersubject ; if this accompanying material is only heard once, it is simply referred to as free counterpoint. Source: Internet
In music an "answer" (also known as countersubject ) is the technical name in counterpoint for the repetition or modification by one part or instrument of a theme proposed by another. Source: Internet