gua·​no | \ ˈgwä-(ˌ)nō How to pronounce guano (audio) \

Definition of guano

: a fertilizer containing the accumulated excrement of seabirds or bats broadly : excrement especially of seabirds or bats

Examples of guano in a Sentence

Recent Examples on the Web Smaller anomalies like cracks are more difficult for models to recognize since they can be masked by dirt, guano or water, said Andy Abranches, PG&E’s senior director of wildfire risk management. Isabelle Bousquette, WSJ, 12 May 2022 And the coastal waters of Peru have historically been rich in phytoplankton, the tiny marine organisms that fish eat, making the guano there particularly nutritious. David Treuer, Harper's Magazine, 26 Oct. 2021 The uninhabited Chincha Islands are home to guanay cormorants, Peruvian boobies, and Peruvian pelicans, who gather in enormous flocks off the coast, coating rocks in their guano. David Treuer, Harper's Magazine, 26 Oct. 2021 Seabirds, for example, nest on an island, forage in the water, and then come back on the land, where their guano fertilizes plants. Devi Lockwood, Wired, 21 Sep. 2021 Older bat guano deposits have been studied from caves in Romania, Kurdistan and the Philippines, some dating back hundreds of thousands of years. Richard Kemeny, Smithsonian Magazine, 23 Jan. 2020 Since the guano produced by the birds eventually kills the nest trees, heron rookeries have a limited life span. Paul A. Smith, Milwaukee Journal Sentinel, 12 June 2021 Perfect for budding ornithologists or the misanthropy-curious, this midsize guano-and-stone property boasts the wildlife of a birdhouse and the night life of a lighthouse. Simon Webster, The New Yorker, 14 May 2021 With fewer bats around, there is half as much guano collected as a decade ago. New York Times, 17 Jan. 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'guano.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of guano

1604, in the meaning defined above

History and Etymology for guano

Spanish, from Quechua wanu fertilizer, dung

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Last Updated

25 May 2022

Cite this Entry

“Guano.” Dictionary, Merriam-Webster, Accessed 28 May. 2022.

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