noun
newspaper serial novel
A novel published in installments in a newspaper, a common format in Japanese literary culture.
彼の最新作は新聞小説として連載されている。
His latest work is being serialized as a newspaper novel.
連載小説 is a broader term for any serialized novel (in magazines, online, etc.), while 新聞小説 specifically refers to those serialized in newspapers.
Compound of 新聞 (newspaper) and 小説 (novel).