👉 A vinculum is a punctuation mark that represents an open circle in Latin and Greek. It is used to indicate that something is not closed or complete, as if it were open at the end of a line. For example: - The word "The" is often written with a vinculum at the end. - In mathematics, a vinculum is used to denote limits. In this context, I would define a vinculum as: A vinculum is a punctuation mark that represents an open circle