dunce hat

Nghĩa (Tiếng Anh)

1. A conical hat that a school pupil is made to wear to indicate that he/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.

Từ đồng nghĩa

fool’s cap

dunce cap

dunce’s cap

dunce’s hat