Share this entry
guanine Line breaks: guan|ine
Pronunciation: /ˈɡwɑːniːn/

Definition of guanine in English:


[mass noun] Biochemistry
A compound that occurs in guano and fish scales, and is one of the four constituent bases of nucleic acids. A pure derivative, it is paired with cytosine in double-stranded DNA.
  • Alternative name: 6-oxy-2-aminopurine; chemical formula: C5H5N5O
Example sentences
  • There are four DNA bases: adenine, cytosine, guanine, and thymine (A, C, G, and T).
  • The film's name comes from the initials of the four DNA bases of our genetic code: guanine, adenine, cytosine and thymine.
  • The four become cytosine, guanine, adenine, and thymine, and the quantum forces that maintained the rest of universe sit on the sidelines while life take center stage.


Mid 19th century: from guano + -ine4.

Definition of guanine in:
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove adverts and access premium resources