guano(redirected from Phosphate rock island)
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guanothe white nitrogenous dried excrement, high in uric acid content, that is produced by birds and reptiles. Guano is a valuable fertilizer and has been extensively harvested from guano bird (cormorant) colonies in South America.
compacted droppings of birds or bats used as fertilizer; a known carrier of disease, e.g. histoplasmosis.