Gp. with Indonesia and Algeria as members

• Grp. with many Mideast members
• Big oil cartel: Abbr
• Oil acronym
• Intl. group with two South American members and none in North America
• Ecuador is a member of it
• What Indonesia rejoined in 2016
• Oil producer's grp
• Grp. that has the world over a barrel?
• Price-setting grp.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
initialism (acronym) for Organization of Petroleum-Exporting Countries, founded 1960.