dunce cap

1. A conical hat that a school pupil is forced to wear to indicate that the person is a dunce.

   Eselsmütze, Eselskappe

   дура́цкий колпа́кduráckij kolpák

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.

1. Tom had to wear a dunce cap.

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правильный

• dunce's capalternative