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
According to the study, the guano’s byproducts accelerated the formation of clouds by 10,000 times.
—
Sara Hashemi, Smithsonian Magazine, 27 May 2025
Finally, liquid bat guano and liquid earthworm castings (guano and castings are euphemisms for excrement) are also utilized for foliar fertilization.
—Joshua Siskin, Orange County Register, 14 Feb. 2025
Clinicians need to ask about bat guano exposure in cannabis growers to discuss preventive measures and establish timely diagnoses.
—Tim Ryan, Newsweek, 17 Dec. 2024
The man had bought bat guano online for use as marijuana fertilizer, unknowingly cultivating the fungus and inhaling it.
—Dario Sabaghi, Forbes, 17 Dec. 2024
See All Example Sentences for guano
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Sara Hashemi, Smithsonian Magazine, 27 May 2025
Finally, liquid bat guano and liquid earthworm castings (guano and castings are euphemisms for excrement) are also utilized for foliar fertilization.
—Joshua Siskin, Orange County Register, 14 Feb. 2025
Clinicians need to ask about bat guano exposure in cannabis growers to discuss preventive measures and establish timely diagnoses.
—Tim Ryan, Newsweek, 17 Dec. 2024
The man had bought bat guano online for use as marijuana fertilizer, unknowingly cultivating the fungus and inhaling it.
—Dario Sabaghi, Forbes, 17 Dec. 2024
See All Example Sentences for guano
Cite this Entry
“Guano.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/guano. Accessed 30 Jul. 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share