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## E Quick reference

### A Dictionary of Weights, Measures, and Units

*Metric* As an upper-case prefix, E, see exa-, e.g. Eg = exagram.

mathematics. As E, initial letter of exponent, see ...

## golden number Quick reference

### A Dictionary of Weights, Measures, and Units

The number 1.618∼, unique in that its value equals the ratio of its integer part to its fractional part, i.e....

## grain Quick reference

### A Dictionary of Weights, Measures, and Units

## horse Quick reference

### A Dictionary of Weights, Measures, and Units

## hounsfield unit Quick reference

### A Dictionary of Weights, Measures, and Units

## logarithm Quick reference

### A Dictionary of Weights, Measures, and Units

[Gk: λογοσ ‘ratio’]

mathematics. Symbol log. For any positive number *N*, and some reference base number b, also positive, the power to which b must be raised to equal ...

## neper Quick reference

### A Dictionary of Weights, Measures, and Units

## pi Quick reference

### A Dictionary of Weights, Measures, and Units

## Planck length Quick reference

### A Dictionary of Weights, Measures, and Units

sub-atomic physics. Units of length, mass, and time chosen to give normalized values for the Newtonian constant of gravitation (...

## Q factor Quick reference

### A Dictionary of Weights, Measures, and Units

[quality factor]

electrics. Indicating overall conservational quality of an electric circuit,where *f* is frequency, *L* is inductance, *C* is capacitance, and ...

## tyre size Quick reference

### A Dictionary of Weights, Measures, and Units

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