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# modulus

[moj-uh-luh s]
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noun, plural mod·u·li [moj-uh-ahy] /ˈmɒdʒ ə aɪ/.
1. Physics. a coefficient pertaining to a physical property.
2. Mathematics.
1. that number by which the logarithms in one system are multiplied to yield the logarithms in another.
2. a quantity by which two given quantities can be divided to yield the same remainders.

## Origin of .css-1fxfie5{font-size:22px;}@media (max-width:768px){.css-1fxfie5{font-size:18px;margin:0 10px 10px 0;word-break:break-all;word-wrap:break-word;-webkit-hyphens:auto;-moz-hyphens:auto;-ms-hyphens:auto;hyphens:auto;line-height:22px;}}modulus

1555–65; < Latin: a unit of measure; see mode1, -ule
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## Examples from the Web for moduli

### Historical Examples

• #### The intensities of the reflected and transmitted lights are the squares of the moduli of these expressions.

Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 6

Various

• #### The moduli of Young and of simple rigidity lend themselves readily to quantitative laboratory experiments.

College Teaching

Paul Klapper

British Dictionary definitions for moduli

# modulus

noun plural -li (-ˌlaɪ)
1. physics a coefficient expressing a specified property of a specified substance
2. maths the absolute value of a complex number
3. maths the number by which a logarithm to one base is multiplied to give the corresponding logarithm to another base
4. maths an integer that can be divided exactly into the difference between two other integers7 is a modulus of 25 and 11 See also congruence (def. 2)

## Word Origin

C16: from Latin, diminutive of modus measure
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

moduli in Science

# modulus

[mŏjə-ləs]
Plural moduli (mŏjə-lī′)
1. A number by which two given numbers can be divided and produce the same remainder.
2. The numerical length of the vector that represents a complex number. For a complex number a + bi, the modulus is the square root of (a2 + b2).
3. The number by which a logarithm to one base must be multiplied to obtain the corresponding logarithm to another base.