guano

 
Pronunciation: /ˈgwɑːnəʊ/

noun (plural guanos)

[mass noun]
  • the excrement of seabirds and bats, used as fertilizer.
  • an artificial fertilizer resembling natural guano, especially one made from fish.

Origin:

early 17th century: from Spanish, or from Latin American Spanish huano, from Quechua huanu 'dung'