A three-sided hat with the brim turned up / (mathematics) A three-horned fractal

Having three horns or similar projections

plural of tricorn

(fiction) A fictional futuristic handheld device used for scanning, which may be specialized for medical, technical, or other purposes. / (slang) A real-world advanced handheld medical scanner.

plural of tricorder

Alternative spelling of tricorn

Alternative spelling of tricorn

That has three corners.

Tricornered; having three corners.

plural of tricorne