uracil

noun
ura·​cil | \ ˈyu̇r-ə-ˌsil How to pronounce uracil (audio) , -səl \

Definition of uracil

: a pyrimidine base C4H4N2O2 that is one of the four bases coding genetic information in the polynucleotide chain of RNA — compare adenine, cytosine, guanine, thymine

Examples of uracil in a Sentence

Recent Examples on the Web However, rather than the conventional duo of base pairs, adenine and uracil or cytosine and guanine, the molecules form hexamers, or six-membered rings. Quanta Magazine, "Chemists Seek Possible Precursor to RNA," 5 Feb. 2014

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'uracil.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of uracil

1890, in the meaning defined above

History and Etymology for uracil

International Scientific Vocabulary ur- entry 1 + acetic + -il (substance relating to)

Keep scrolling for more

Learn More about uracil

Time Traveler for uracil

Time Traveler

The first known use of uracil was in 1890

See more words from the same year

Dictionary Entries near uracil

ur-

Ur

-ura

uracil

urad

uraeus

U rail

See More Nearby Entries 

Statistics for uracil

Cite this Entry

“Uracil.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/uracil. Accessed 18 Jan. 2021.

Keep scrolling for more

More Definitions for uracil

uracil

noun
ura·​cil | \ ˈyu̇r-ə-ˌsil, -səl How to pronounce uracil (audio) \

Medical Definition of uracil

: a pyrimidine base C4H4N2O2 that is one of the four bases coding genetic information in the polynucleotide chain of RNA — compare adenine, cytosine, guanine, thymine

More from Merriam-Webster on uracil

Britannica.com: Encyclopedia article about uracil

Comments on uracil

What made you want to look up uracil? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Words of Snow and Ice Quiz

  • image1037863653
  • Which of the following refers to thin, bending ice, or to the act of running over such ice?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!