茶锈

茶鏽
cháxiù
tea stain (on the inside of a tea pot, tea cup etc)

CEDICT

yellow-brown substance on teaware (usually after long use); tea stain

Wiktionary

附着茶具黄褐色痕迹通常长时间喝茶累积

重編國語辭典

Entry Composition

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