 The earliest Western reference to the term "koro" is found in B.F. Matthes' "Dictionary of Buginese Language" (1874) of South Sulawesi, Indonesia.The name could derived from a river, its surrounding valley, and a local tribe of the same name which is located at northwestern sector of Sulawesi, Indonesia.The word is also used in Makassarese language, meaning "to shrink"; the full expression is "garring koro".