Dragon's teeth

Dragon's teeth or dragon's tooth first appeared in Greek mythology; once planted, each tooth grew into a fully armed warrior. This gave rise to the phrase "to sow dragon's teeth," used as a metaphor to refer to doing something that has the effect of fomenting disputes.

Later uses of the term are:

Military engineering

Dragon's teeth (fortification), anti-tank obstacles

Books

Dragon's Teeth: A Novel, an 1878 realist novel
The Dragon's Teeth, a 1939 mystery novel
Dragon's Teeth (novel), a 1942 Pulitzer Prize-winning historical novel by Upton Sinclair
Dragon's teeth: the background, contents and consequences of the North Atlantic Pact, 1949 non-fiction book by Konni Zilliacus
"Dragons' Teeth" (short story), a 1977 fantasy short story
The Dragon's Teeth?, a 1982 American book
The Dragon's Tooth, a 2011 fantasy novel
Dragon's Teeth, a fantasy novel by James A. Hetley (sequel to "Dragon's Eye")
Dragon's Teeth Mountains, a fictional mountain range in the Shannara series of books

Other literature and media

"The Dragon's Teeth" (radio), a 1941 radio story
"Dragon's Teeth" (Star Trek: Voyager), a 1999 television episode
Dragon's Tooth, a fictional sniper rifle in the Fafner in the Azure anime series
Dragon's Tooth (video game), a 1986 British video game

Botany

Dragon's teeth (plant), a plant species in the genus Lotus

Traffic engineering

Dragon's Teeth (traffic), a series of calibrated lines painted on a road surface to enforce a speed limit

Geography

Dragons Teeth (Antarctica), a small group of rocks in Antarctica
Dragon's Teeth Gate, a craggy granite outcrop in Singapore
Dragon's Tooth (Virginia), a trail landmark in Virginia