Definition of guano
: a fertilizer containing the accumulated excrement of seabirds or bats; broadly : excrement especially of seabirds or bats
Recent Examples of guano from the Web
Fertilizer as good as bat guano for high-alkaline soil.
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Origin and Etymology of guano
Spanish, from Quechua wanu fertilizer, dung
First Known Use: 1604
GUANO Defined for English Language Learners
Definition of guano for English Language Learners
: waste material from birds and bats that is used to help plants grow
Seen and Heard
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