*guacharo*

‖n. [ Cf. Sp. guácharo sickly, dropsical, guacharaca a sort of bird. ] (Zool.) A nocturnal bird of South America and Trinidad (Steatornis Caripensis, or S. steatornis); -- called also oilbird. [ 1913 Webster ]

☞ It resembles the goatsuckers and nighthawks, but feeds on fruits, and nests in caverns. A pure oil, used in place of butter, is extracted from the young by the natives. [ 1913 Webster ]