Finding a cure for cancer is the holy grail of medical researchers.
15th century
: something that you want very much but that is very hard to get or achieve
the Holy Grail : the cup that is said to have been used by Jesus Christ and that was sought by knights during the Middle Ages
See words that rhyme with Holy Grail Nglish: Translation of Holy Grail for Spanish speakers Britannica.com: Encyclopedia article about Holy Grail
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