noun
Literary or poetic term for a ruby; in everyday speech, ルビー is more common.
See also: ルビー
彼女の指輪には大きな紅玉がはめ込まれていた。
A large ruby was set in her ring.
noun
Jonathan apple
Refers specifically to the Jonathan variety of apple; used in agricultural or culinary contexts.
この紅玉は酸味が強くて、アップルパイにぴったりだ。
These Jonathan apples are tart and perfect for apple pie.
noun
glowing skin; beautiful looks
Archaic poetic term for radiant beauty or complexion; not used in modern conversation.
古典文学では、紅玉のような肌と表現されることがある。
In classical literature, skin is sometimes described as being like a ruby.