gua·no

[gwah-noh]
noun
1.
a natural manure composed chiefly of the excrement of sea birds, found especially on islands near the Peruvian coast.
2.
any similar substance, as an artificial fertilizer made from fish.

Origin:
1595–1605; < Spanish: fertilizer, dung; American Spanish huano dung < Quechua wanu dung for fuel, fertilizer

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World English Dictionary
guano (ˈɡwɑːnəʊ) [Click for IPA pronunciation guide]
 
n , pl -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
 
[C17: from Spanish, from Quechuan huano dung]

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Guano is always a great word to know.
So is gobo. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
Etymonline
Word Origin & History

guano
1604, from Sp. guano "dung," especially of sea-birds on islands off Peru, from Quechua huanu "dung." Guanine, named 1850, so called because first isolated from guano.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
guano   (gwä'nō)  Pronunciation Key 
  1. A substance composed chiefly of the dung of sea birds or bats, accumulated along certain coastal areas or in caves and used as fertilizer.

  2. Any of various similar substances, such as a fertilizer prepared from ground fish parts.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
All guano collected from an individual was regarded as a single sample.
Their guano carries diseases and that alone should be a enough to convince you
  otherwise.
Bats also come and go, leaving behind guano, and their dead.
Bat guano is an excellent fertilizer because it is high in nitrates.
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