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

Wherever the guano is, that’s where the cockroaches will be (read: everywhere). Caitlin Morton, Condé Nast Traveler, "Creepy Catacombs, Islands of Dolls, and 18 Other Terrifying Places for Thrill Seekers," 4 Sep. 2019 Some will think this is bat-guano bonkers, others won’t, but the political reality is that this storyline is just too complicated to replace the Mueller narrative. Jonah Goldberg, National Review, "Without a Suitable Enemy, Trump Is Adrift," 28 Aug. 2019 The Bat in Churches project used All Saints Church as a guinea pig for their new method of solving the guano problem by filling in gaps in the ceiling to prevent urine and feces from getting through. Fox News, "Bat droppings no longer impacting church service in England: 'We had to clean the pews every time'," 25 Aug. 2019 Seabird guano is also 10-10-2 and full of micronutrients as well as good amounts of NPK. Jeff Lowenfels, Anchorage Daily News, "Feed your garden beds now so they’ll be ready for spring," 22 Aug. 2019 But in the early 19th and 20th centuries, people harvested the nitrogen-rich guano from the islands for fertilizer. Jenny Howard, National Geographic, "Go inside a penguin rescue center with new 360 video," 29 July 2019 Dr Lynch knew from previous work by her collaborators at the University of Houston that corticosterone and its metabolites show up in penguin guano. The Economist, "Contrary to the fears of some, penguins and people do mix," 11 July 2019 Today, the Peruvian government carefully manages an annual guano harvest on certain coastal islands. Kiona N. Smith, Ars Technica, "New study takes a bird’s-eye view of the Nasca Lines," 20 June 2019 Their guano adds the nutrient nitrogen to the islands, leading to big changes in the ecosystem. Jason Daley, Smithsonian, "Coral Reefs Need Fewer Rats and More Bird Poo," 12 July 2018

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.

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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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Statistics for guano

Last Updated

12 Sep 2019

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Time Traveler for guano

The first known use of guano was in 1604

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English Language Learners Definition of guano

: waste material from birds and bats that is used to help plants grow

More from Merriam-Webster on guano

Rhyming Dictionary: Words that rhyme with guano

Spanish Central: Translation of guano Encyclopedia article about guano

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What made you want to look up guano? Please tell us where you read or heard it (including the quote, if possible).


formidable, illustrious, or eminent

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