guaninen.
/ˈɡwɑːniːn/, /ˈɡuːəniːn/, U.S. /ˈɡwɑˌnin/, /ˈɡwɑnən/ Chemistry.
A white amorphous substance obtained abundantly from guano, forming a constituent of the excrement of birds, and found in the liver, pancreas, and other parts of animals.
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the world > matter > chemistry > organic chemistry > substances from animals or humans > [noun] > miscellaneous other substances
guanine1850
amyloid1872
chitosan1895
chondroitin1895
xanthopterin1926
lipocaic1936
xylulose1936
1850 Fownes's Man. Elem. Chem. (ed. 3) 499 Guano also contains a peculiar substance called guanine, which closely corresponds with xanthic oxide.
1859 New Sydenham Soc. Year-bk. 93 Scherer detected guanin in the pancreas of the ox.
1889 P. Geddes & J. A. Thomson Evol. Sex 23 Guanin, so abundant on the skin of fishes and some other animals.
1952 New Biol. 13 75 This same silvery sheen, due to the deposition of crystals of guanine in the skin, also appears in the rainbow trout of Michigan streams.
1966 New Scientist 24 Nov. 424/1 These are the four main genetic ‘code letters’ or bases adenine, guanine, thymine and cytosine.
This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2022).
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n.1850