1.
bitter orange; Seville orange
A citrus fruit (Citrus aurantium) with a sour, bitter taste. Traditionally placed on top of kagami mochi as a New Year's decoration.
The word 橙 originally refers to the bitter orange fruit, a citrus used in traditional Japanese New Year decorations. The fruit is placed on top of 鏡餅 (stacked rice cakes) because its name is a homophone of 代々 (from generation to generation), symbolizing the continuation of the family line.
Common collocations
Cultural note
In modern Japanese, the imported word オレンジ is more commonly used for the color orange in casual speech, while 橙 or 橙色 is the traditional Japanese color name. The bitter orange fruit itself is different from the sweet eating orange (蜜柑).