early 15c. "petroleum, rock oil" (mid-14c. in Anglo-French), from Medieval Latin petroleum, from Latin petra "rock" (see petrous) + oleum "oil" (see oil (n.)).
例文
1. Petroleum engineers plan and manage the extraction of oil.
石油技師は石油の精製を計画し、管理する。
2.The purpose of oil refinery is to refine crude petroleum .
製油所の主な作業は原油の精製である。
3.The Government of Iran advanced the price of petroleum last week.
先週、イラン政府は石油価格を引き上げた。
4.They refined crude oil into various petroleum products.