(Science: zoology) a nocturnal bird of south America and Trinidad (Steatornis Caripensis, or s. Steatornis); called also oilbird.
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.
Origin: cf. Sp. Guacharo sickly, dropsical, guacharaca a sort of bird.