noun
Specifically the cup used in Christian Eucharist services.
司祭は聖杯を両手で掲げた。
The priest raised the chalice with both hands.
noun
Holy Grail
Refers to the legendary cup used by Christ at the Last Supper, often sought in medieval legends.
アーサー王の騎士たちは聖杯を探し求めた。
King Arthur's knights sought the Holy Grail.
From 聖 (holy) + 杯 (cup). The term is used in Christian contexts for both the communion chalice and the legendary Holy Grail.