dinkus
A small drawing or artwork used for decoration in a magazine or periodical.
A small ornament, usually a line of three asterisks (* * *), especially for the purpose of breaking up sections of a chapter, article, or other text.
More generally a dinkus is a small ornamentation, usually three asterisks, that break up sections of a book chapter, article or other written text.
Where it comes from
From dinky (“tiny and cute”). The word was coined by an artist on the Australian periodical The Bulletin in the 1920s.
Adapted from the Wiktionary entry dinkus (CC BY-SA 4.0).