An Earthquake is a sudden tremor or movement of the earth's crust, which originates naturally at or below the surface.The word natural is important here, since it excludes shock waves caused by French nuclear tests, man made explosions and landslides caused by building work. There are two main causes of earthquakes.n Earthquake is a sudden tremor or movement of the earth's crust, which originates naturally at or below the surface.
Definition of TANGRAM. : a Chinese puzzle made by cutting a square of thin material into five triangles, a square, and a rhomboid which are capable of being recombined in many different figures.See tangram defined for kids. ADVERTISEMENT.efinition of TANGRAM. : a Chinese puzzle made by cutting a square of thin material into five triangles, a square, and a rhomboid which are capable of being recombined in many different figures. See tangram defined for kids. ADVERTISEMENT.
The noun WOLFRAM has 1 sense: 1. a heavy grey-white metallic element; the pure form is used mainly in electrical applications; it is found in several ores including wolframite and scheelite.Familiarity information: WOLFRAM used as a noun is very rare. Dictionary entry details.he noun WOLFRAM has 1 sense: 1. a heavy grey-white metallic element; the pure form is used mainly in electrical applications; it is found in several ores including wolframite and scheelite.