Guano is the faeces of sea birds and bats. It is used as a fertilizer.
guano in British English
(ˈɡwɑːnəʊ)
nounWord forms: plural-nos
1.
a.
the dried excrement of fish-eating sea birds, deposited in rocky coastal regions of South America: contains the urates, oxalates, and phosphates of ammonium and calcium; used as a fertilizer
b.
the accumulated droppings of bats and seals
2.
any similar but artificial substance used as a fertilizer
Word origin
C17: from Spanish, from Quechuan huano dung
guano in American English
(ˈgwɑnoʊ)
nounWord forms: pluralˈguanos
1.
dung of seabirds, found especially on islands off the coast of Peru: it is used as a fertilizer
2.
any natural or artificial fertilizer resembling this, as bat dung
Word origin
Sp < Quechua huanu, dung
Examples of 'guano' in a sentence
guano
It had been completely coated with the guano produced by several generations of young birds.