Physical Constant

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Physical Constant

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An abstract number or physically dimensional quantity having a fixed or approximately fixed value; a universal and permanent value, as the constant of gravitation; a characteristic of a substance, as the refractive index of liquid. </dd>
A new, consistent set of values for physical constants, which has been recommended by the National Academy of Sciences-National Research Council in 1963, is presented in tables VIII, IX, and X. [[/a>|/a> ]]

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use