TerraForm Power, Inc. operates clean power generation assets such as solar, wind, natural gas, geothermal and hydro-electricity. The Company also operates hybrid power generation assets.
Definition of a Sphere A sphere is a geometrical figure that is perfectly round, 3-dimensional and circular - like a ball. Geometrically, a sphere is defined as the set of all points equidistant from a single point in space.
Definition of circle for English Language Learners. : 1  a perfectly round shape : a line that is curved so that its ends meet and every point on the line is the same distance from the center. : 2  a path that goes around a central point. : 3  an arrangement of people or things that forms a circle.