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.
A circle is the set of points in a plane that are a given distance, called the radius, from a given point in the plane, called the center. A segment from the center to a point on the circle is called a radius. All radii of a circle are congruent. For a demonstration of these definitions click here.