[ ˌkəʊkəʊdə'mɛ: ]
■ noun a tall palm tree native to the Seychelles, having an immense nut in a hard woody shell. [ Lodoicea maldivica .]
Origin
C19: from Fr. coco-de-mer , lit. 'coco from the sea' (because the tree was first known from nuts found floating in the sea).