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zhú bamboo radical (top form of 竹)

Component (a building block) — not the same thing as a radical or a sound component. · 6strokes

Forms

Characters that use it as a component

竿笋笑笔笙笛符笨

Characters filed under it as a radical

Kangxi radical no.118 · 竹 · 6strokes — The 214 Kangxi radicals

Filed under it in a dictionary. That is a lookup convention — it does not mean it is the only part the character is built from.

竹竿笋笑笔笙笛符