Component (a building block) — not the same thing as a radical or a sound component. · 2strokes
产厅厉历压厌厕反
Kangxi radical no.27 · 2strokes — 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.
厂厅历厉压厌厕厘