1. tricorn - Noun
2. tricorn - Adjective
A three-sided hat with the brim turned up
(mathematics) A three-horned fractal
tricorn (not comparable)
Having three horns or similar projections
Dressed in a corseted gown and a tricorn hat, she is a glimpse of a lost world, a vestige of the centuries during which St. Petersburg was the city of the czars, the royal rulers of a vast Russian Empire. Source: Internet
Poet Marianne Moore actually wore a ton of cool toppers, but her trademark was the (rather eccentric) tricorn, of which she once : “I like the shape—it conceals the defects of the head.” Source: Internet