proper+sphere
121Mesopotamia, history of — ▪ historical region, Asia Introduction history of the region in southwestern Asia where the world s earliest civilization developed. The name comes from a Greek word meaning “between rivers,” referring to the land between the Tigris and… …
122Certitude — • The word indicates both a state of mind and a quality of a proposition, according as we say, I am certain , or, It is certain Catholic Encyclopedia. Kevin Knight. 2006. Certitude Certitude …
123LITERATURE, JEWISH — Literature on Jewish themes and in languages regarded as Jewish has been written continuously for the past 3,000 years. What the term Jewish literature encompasses, however, demands definition, since Jews have lived in so many countries and have… …
124Platonic solid — In geometry, a Platonic solid is a convex polyhedron that is regular, in the sense of a regular polygon. Specifically, the faces of a Platonic solid are congruent regular polygons, with the same number of faces meeting at each vertex; thus, all… …
125fluid mechanics — an applied science dealing with the basic principles of gaseous and liquid matter. Cf. fluid dynamics. [1940 45] * * * Study of the effects of forces and energy on liquids and gases. One branch of the field, hydrostatics, deals with fluids at… …
126Hierarchy of the Early Church — • The word hierarchy is used here to denote the three grades of bishop, priest, and deacon (ministri) Catholic Encyclopedia. Kevin Knight. 2006. Hierarchy of the Early Church Hierarchy of the Early Church …
127Star catalogue — An illustration of the Perseus constellation (after Perseus from Greek mythology) from the star catalogue published by the German astronomer Johannes Hevelius in 1690 A star catalogue, or star catalog, is an astronomical catalogue that lists… …
128Modulated neutron initiator — A modulated neutron initiator is a neutron source capable of producing a burst of neutrons on activation. It is a crucial part of some nuclear weapons, as its role is to kick start the chain reaction at the optimal moment when the configuration… …
