noun \ˈgwä-(ˌ)nō\

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

Full Definition of GUANO

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

Origin of GUANO

Spanish, from Quechua wanu fertilizer, dung
First Known Use: 1604

Rhymes with GUANO


noun    (Concise Encyclopedia)

Accumulated excrement and remains of birds, bats, and seals, valued as fertilizer. Bird guano comes mainly from islands off the coasts of Peru, Baja California, and Africa that are heavily populated by cormorants, pelicans, and gannets. Bat guano is found in caves throughout the world, and seal guano has accumulated to great depths on islands off northwestern Peru; both are lower in fertilizer value than bird guano.


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