pilaster

noun
🔊/pɪˈlæstə(r)/
🔊/pɪˈlæstər/
(specialist)
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  1. a flat column that sticks out from the wall of a building, used as decoration壁柱;半露柱
    Word Originlate 16th cent.: from French pilastre, from Italian pilastro or medieval Latin pilastrum, from Latin pila ‘pillar’.