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Definition of Chemical base

Chemical base Definition from Medicine Dictionaries & Glossaries
Terms and Definitions
An essential building block. DNA contains four complementary bases: adenine, which pairs with thymine, and cytosine, which pairs with guanine. In RNA, thymine is replaced by uracil.
Chemical base Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
In chemistry, bases are substances that, in aqueous solution, are slippery to the touch, taste bitter, change the color of indicators (e.g., turn red litmus paper blue), react with acids to form salts, promote certain chemical reactions (base catalysis), accept protons from any proton donor, and/or contain completely or partially displaceable OH- ions. Examples of bases are the hydroxides of the alkali metals and alkaline earth metals (NaOH, Ca(OH)2, etc.).

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