A subpoena duces tecum is a court order requiring the person named in it to produce certain books, papers, or other tangible things for the court.
(plural circlets) 1  A crown without arches or a covering. 2  A small circle. 3  A round body; an orb. ( UK, dialect) A circular piece of wood put under a dish at table.
Using this definition of a circle (the set of points all at the same distance from a given point called the center) we can graph a circle on a coordinate system. The equation of this circle, with its center at the origin, and its radius equal to 3 (the square root of 9) is: