Circinus is a Latin word that means "compass" or "circle." It is used in different contexts, such as in geometry and navigation, to refer to a tool or instrument used to measure or draw circles. There are several synonyms for circinus, such as passare, which means "to pass over" or "to trace out," and sectio, which means "section" or "cutting." Other synonyms include circulus, orbis, and rota, all of which refer to circular or rounded objects. In modern English, the word compass is often used to describe the device used to draw circles, and compass can also be used as a synonym for circinus.