/ ˈdeɪdəʊ; NAmE -doʊ/ noun
( pl. -os , NAmE -oes ) the lower part of the wall of a room when it is a different colour or material from the top part
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WORD ORIGIN
mid 17th cent. (denoting the main part of a pedestal, above the base): from Italian , literally dice or cube , from Latin datum something given, starting point neuter past participle of dare give.