Base

A reference value.

Chemistry

Electronics

The region between the emitter and collector of a transistor that receives minority carriers injected from the emitter. It is the element that corresponds to the control grid of an electron tube.

Mathematics

In the expression xy, x is called the base and y is the exponent.

See also: Alkaline, Base Hydrolysis Constant, Brösted Base, Buffer Solutions, Conjugate Acid, Conjugate Base, Equivalence Point, Exponent, pH, pOH, Strong Base, Weak Bases.

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Subjects: Chemistry Mathematics