ラテン語のsecare「切る」「分ける」から、PIE*sek「切る」「刻む」に由来し、語源的にはsegment, bisectと同じ。派生語の意味 department, field など。
英語の語源
sector (n.)
1560s, "section of a circle between two radii," from Late Latin sector "section of a circle," in classical Latin "a cutter, one who cuts," from sectus, past participle of secare "to cut" (see section (n.)). Translated Greek tomeus in Latin editions of Archimedes. Meaning "area, division" appeared 1920, generalized from military sense (1916) of "part of a front," based on a circle centered on a headquarters. As a verb from 1884. Related: Sectoral; sectorial.
例文
1. The news gave a fillip to the telecommunications sector .
このニュースは電気通信部門に強心剤を注入した。
2.The news from Body Shop rattled the rest of the retail sector .
「美ボディ?ショップ」からのメッセージに小売業界全体が不安になっている。
3.Hungary may have to lower its hopes of shrinking its state sector .
ハンガリーは国家軍事管制区を縮小する期待を下げざるを得ないかもしれない。
4.The staff are forbidden to tender for private- sector work.
従業員は、民間部門の仕事を入札で引き受けてはならない。
5.The private sector ，by contrast，has plenty of money to spend.