SECTOR

sector

(noun) measuring instrument consisting of two graduated arms hinged at one end

sector, sphere

(noun) a particular aspect of life or activity; “he was helpless in an important sector of his life”

sector

(noun) a social group that forms part of the society or the economy; “the public sector”

sector

(noun) a portion of a military position

sector

(noun) the minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes

sector

(noun) a plane figure bounded by two radii and the included arc of a circle

Source: WordNet® 3.1

Etymology

Noun

sector (plural sectors)

section

zone (designated area).

(geometry) part of a circle, extending to the center

(computer hardware) fixed-sized unit (traditionally 512 bytes) of sequential data stored on a track of a digital medium (compare to block)

(military) an area designated by boundaries within which a unit operates, and for which it is responsible

(military) one of the subdivisions of a coastal frontier

(science fiction) a fictional region of space designated for navigational or governance purposes.

(calculation) an instrument consisting of two rulers of equal length joined by a hinge.

a field of economic activity

(engineering) A toothed gear whose face is the arc of a circle.

(motor racing) A fixed, continuous section of the track, such that sectors do not overlap but all sectors make up the whole track.

Anagrams

• Coster, Ectors, Tresco, corset, coster, escort, recost, rectos, scoter, scrote

Source: Wiktionary

Sec"tor, n. Etym: [L., properly, a cutter, fr. secare, sectum, to cut: cf. F. secteur. See Section.]

1. (Geom.)

Definition: A part of a circle comprehended between two radii and the included arc.

2. A mathematical instrument, consisting of two rulers connected at one end by a joint, each arm marked with several scales, as of equal parts, chords, sines, tangents, etc., one scale of each kind on each arm, and all on lines radiating from the common center of motion. The sector is used for plotting, etc., to any scale.

3. An astronomical instrument, the limb of which embraces a small portion only of a circle, used for measuring differences of declination too great for the compass of a micrometer. When it is used for measuring zenith distances of stars, it is called a zenith sector. Dip sector, an instrument used for measuring the dip of the horizon.

– Sector of a sphere, or Spherical sector, the solid generated by the revolution of the sector of a circle about one of its radii, or, more rarely, about any straight line drawn in the plane of the sector through its vertex.

Source: Webster’s Unabridged Dictionary 1913 Edition