plural of Cira

(graph theory) an Eulerian trail that begins and ends at the same node

(geometry) A reference circle about which two other circles are inverses of each other

(mathematics) The number of independent cycles in a graph

plural of ciranda

a cone with a circular base

A large circle marked with degrees, etc., fixed to a wall, for measuring arcs of the meridian.

A group of people who create fan-made (doujin) works – such as doujinshi, doujin music, or doujin games – and participate in doujin events.

(mathematics) An angle that defines a position on a circle.

Synonym of Banana Pancake Trail