Sector
Part of speech: noun
Definition: section zone A part of a circle, extending to the center. a fixed-sized unit (traditionally 512 bytes) of sequential data stored on a track of a digital medium (compare to block) An area designated by boundaries within which a unit operates, and for which it is responsible. One of the subdivisions of a coastal frontier. a fictional region of space designated for navigational or governance purposes; for instance, W:Sector (Star Trek), W:List of Star Wars sectors
Example sentence: I monitor very carefully, in the automobile sector in particular, the development of new technologies which help to limit negative effects on the environment by influencing human actions.
Sphere
Part of speech: noun
Definition: A regular three-dimensional object in which every cross-section is a circle; the figure described by the revolution of a semi-circle about its diameter.The set of all points in three-dimensional Euclidean space (or -dimensional space, in topology) that are a fixed distance from a fixed point.A spherical object; a globe or ball.The apparent outer limit of space, the edge of the heavens, imagined as a hollow globe within which celestial bodies appear to be embedded.Any of the concentric hollow transparent globes formerly believed to rotate around the Earth, and which carried the heavenly bodies; there were originally believed to be eight, and later nine and ten; friction between them was thought to cause a harmonious sound (the music of the spheres).An area of activity for a planet; or by extension, an area of influence for a god, hero etc.The region in which something or someone is active; one's province, domain.
Example sentence: Nature is the glass reflecting God, as by the sea reflected is the sun, too glorious to be gazed on in his sphere.