reserve currency
US /rɪˈzɜːrv ˌkɜːr.ən.si/
UK /rɪˈzɜːrv ˌkɜːr.ən.si/

1.
reservevaluta
a foreign currency held by central banks and other monetary authorities as a means of payment or to support their domestic currency
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The US dollar has long been the world's primary reserve currency.
De Amerikaanse dollar is lange tijd de belangrijkste reservevaluta ter wereld geweest.
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Some countries are advocating for a new global reserve currency to reduce reliance on the dollar.
Sommige landen pleiten voor een nieuwe mondiale reservevaluta om de afhankelijkheid van de dollar te verminderen.