Experimental fiction (Genre/Form Term)

Henry, L. The fiction dictionary, c1995 (Avant-garde fiction (experimental fiction) : writing that stands out from the prevailing style of its era in form, style or subject matter--in a way, needless to say, that does not seem obsolete or archaic.)

Baldick, C. Oxford dictionary of literary terms, c2008 (Avant-garde: The French military and political term for the vanguard of any army or political movement, extended since the late 19th century to that body of artist and writers who are dedicated to the idea of art as experiment and revolt against tradition. Ezra Pound's view that "Artists are the antennae of the race," is a distinctly modern one, implying a duty to stay ahead of one's time through constant innovation in forms and subjects.)

Wikipedia, October 31, 2012 (Experimental literature refers to written work--usually fiction or poetry--that emphasizes innovation, most especially in technique.)

LCSH, Oct. 21, 2014 (Experimental fiction. UF Avant-garde fiction. BT Fiction)

Fiction that emphasizes innovative or unconventional technique at the time they were created.