late 13c., cors "body," from Old French cors "body, person, corpse, life" (9c.), from Latin corpus "body" (see corporeal). Sense in English evolved from "dead body" (13c.) to "live body" (14c.) to "body of citizens" (15c.) to "band of knights" (mid-15c.). The modern military sense (1704) is from French corps d'armée (16c.), picked up in English during Marlborough's campaigns.
French restored the Latin -p- in 14c., and English followed 15c., but the pronunciation remained "corse" at first and corse persisted as a parallel formation. After the -p- began to be sounded (16c. in English), corse became archaic or poetic only.
例文
1. Encouraging teacher transfer would not，by itself，integrate the teaching corps .
教師の異動自体が教育チームにおける人種隔離を解消しないことを奨励する。
2.David McNeil is travelling with the White House press corps .
デイビッド?マクニールがホワイトハウス記者団と一緒に歩いている。
3.She handled travel arrangements for the press corps during the presidential campaign.
大統領選挙運動期間中の報道陣のスケジュールを担当した。
4.She was plucked from the corps de ballet to take on Juliet.