cǎi​dàn

painted eggshell

彩蛋 cǎi​dàn
painted eggshell noun
A decorative painted egg or a traditional Easter egg.

On Easter Day, the children look for Easter eggs on the lawn.

hidden feature noun
A hidden surprise in software, games, or movies, including post-credits scenes.

Don't rush to leave after the movie ends; there's an Easter egg after the credits.

Frequency

Written text
5.81 per million

Sources

Definitions
CC-CEDICT
Frequency data
BCC Corpus (BLCU)