tricorn

[trahy-kawrn] /ˈtraɪ kɔrn/
adjective
1.
having three horns or hornlike projections; three-cornered.
noun
2.
Also, tricorne. a hat with the brim turned up on three sides.
Origin
1750-60; < Latin tricornis having three horns, equivalent to tri- tri- + corn(ū) horn + -is adj. suffix
British Dictionary definitions for tricorne

tricorn

/ˈtraɪˌkɔːn/
noun
1.
a cocked hat with opposing brims turned back and caught in three places
2.
an imaginary animal having three horns
adjective
3.
having three horns or corners
Word Origin
C18: from Latin tricornis, from tri- + cornuhorn