dunce cap

Meaning

1. A conical hat that a school pupil is forced to wear to indicate that he or she is a dunce.
2. The topological space obtained by identifying the sides comprising the boundary of a triangle, two sides with consistent orientation and the third with the reverse orientation.

Synonyms

dunce’s cap

fool’s cap

dunce’s hat

cockscomb

kohleria

dunce hat

coxcomb