(n.) an aggressive argument against a specific opinion (My brother launched into a polemic against my arguments that capitalism was an unjust economic system.)

a controversy, especially over a belief or dogma Would it be a polemic that denounced Western imperialism for using cinema to undermine emerging nations like Kazakhstan? — New York Times (Oct 4, 2010) [..]

1630s, "controversial argument or discussion," from French polémique (16c./17c.), noun use of adjective meaning "disputatious, controversial" (see polemic (adj.)).

1640s, from French polémique (from Middle French polemique) "disputatious, controversial," or directly from Greek polemikos "of war, warlike, belligerent; skilled in war, fit for servic [..]

An argument or debate, usually on a controversial subject. Also refers to a person inclined to argument or debate. A skilled debater or writer of polemical works is a polemicist. The art or practice o [..]

(n) a writer who argues in opposition to others (especially in theology)(n) a controversy (especially over a belief or dogma)(adj) of or involving dispute or controversy

a style of writing which attacks its subject without compromise, from the Greek polemos, war.  Polemics can be a form of poetic satire (i.e., Juvenalian satire) and it also can be a form of prose essa [..]