The coconut tree (Cocos nucifera) is a member of the palm tree family (Arecaceae) and the only known living species of the genus Cocos. The term "coconut" can refer to the whole coconut palm, the seed, or the fruit, which botanically is a drupe, not a nut. The term is derived from the 16th-century Portuguese and Spanish word coco, meaning "head" or "skull" after the three indentations on the coconut shell that resemble facial features.