Base

Pronunciation

Definition 1

In chemistry, a substance that can accept hydrogen ions in water and can neutralize an acid. Bases feel soapy or slippery on the skin and they can turn certain dyes blue. An example of a base is sodium hydroxide. Basicity is measured on a scale called the pH scale. On this scale, a pH value of 7 is neutral, and a pH value of more than 7 to 14 shows increasing basicity. (NCI Dictionary)

Definition 2

A substance that dissociates to give hydroxide ions in aqueous solutions; a substance capable of donating a pair of electrons (to an acid) for the formation of a coordinate covalent bond; a substance whose molecule or ion can combine with a proton (hydrogen ion); a substance that combines with acids to form salts. (NCI Thesaurus)

Definition 3

The underlying or supportive part of an anatomic structure. (NCI Thesaurus)

Definition 4

The most important or necessary part of something. (NCI Thesaurus)

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