[pyoo r-een, -in]
- a white, crystalline compound, C5H4N4, from which is derived a group of compounds including uric acid, xanthine, and caffeine.
- one of several purine derivatives, especially the bases adenine and guanine, which are fundamental constituents of nucleic acids.
Origin of purine
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a colourless crystalline solid that can be prepared from uric acid. Formula: C 5 H 4 N 4
- Also called: purine base any of a number of nitrogenous bases, such as guanine and adenine, that are derivatives of purine and constituents of nucleic acids and certain coenzymes
Word Origin for purine
C19: from German Purin; see pure, uric, -ine ²
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for purine
Online Etymology Dictionary, © 2010 Douglas Harper
- A colorless crystalline organic base that is the parent compound of various biologically important derivatives.
- Any of a group of organic compounds that are derived from or are structurally related to purine, including uric acid, caffeine, adenine, and guanine.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- Any of a group of organic compounds containing two fused rings of carbon and nitrogen atoms. One ring has six members, the other has five, and each has two nitrogens. Purines include a number of biologically important compounds, such as adenosine, caffeine, uric acid, and the two bases adenine and guanine, which are components of DNA and RNA.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.