guano
noun
gua·no
ˈgwä-(ˌ)nō 
: 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
All that airborne guano is nature’s marine fertilizer, and scientists have been vastly underestimating how much seabird poop is actually fertilizing our oceans and coastlines.
—
Popular Science Team, Popular Science, 10 Sep. 2025
According to the study, the guano’s byproducts accelerated the formation of clouds by 10,000 times.
—Sara Hashemi, Smithsonian Magazine, 27 May 2025
Even after the penguins migrated from the area, the ammonia concentration was still more than 100 times higher than the baseline, as the penguin guano left at the colony site continued to emit the gas.
—Doyle Rice, USA Today, 24 May 2025
The team is also working on restoring the habitat across the island, which was stripped of all its vegetation during its time as an erstwhile guano mining spot.
—Tim Chester, AFAR Media, 17 Apr. 2025
See All Example Sentences for guano
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Popular Science Team, Popular Science, 10 Sep. 2025
According to the study, the guano’s byproducts accelerated the formation of clouds by 10,000 times.
—Sara Hashemi, Smithsonian Magazine, 27 May 2025
Even after the penguins migrated from the area, the ammonia concentration was still more than 100 times higher than the baseline, as the penguin guano left at the colony site continued to emit the gas.
—Doyle Rice, USA Today, 24 May 2025
The team is also working on restoring the habitat across the island, which was stripped of all its vegetation during its time as an erstwhile guano mining spot.
—Tim Chester, AFAR Media, 17 Apr. 2025
See All Example Sentences for guano
Cite this Entry
“Guano.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/guano. Accessed 23 Sep. 2025.
Copy CitationKids Definition
guano
noun
gua·no
ˈgwän-ō
: a substance composed chiefly of the excrement of seabirds or bats and used as a fertilizer
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