novella

noun, plural no·vel·las, no·vel·le [noh-vel-ee, –vel-ey] /noʊˈvɛl i, -ˈvɛl eɪ/.

1. a tale or short story of the type contained in the Decameron of Boccaccio.
2. a fictional prose narrative that is longer and more complex than a short story; a short novel.

noun plural -las or -le (-leɪ)

1. (formerly) a short narrative tale, esp a popular story having a moral or satirical point, such as those in Boccaccio’s Decameron
2. a short novel; novelette

1902; see novel (n.).