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.
Thus, a circle can be more simply defined as the locus of points each of which is a fixed distance from a single given focus. A circle can also be defined as the circle of Apollonius, in terms of two different foci, as the set of points having a fixed ratio of distances to the two foci.