# modulus

[moj-uh-luh s] /ˈmɒdʒ ə ləs/
noun, plural moduli
[moj-uh-ahy] /ˈmɒdʒ ə aɪ/ (Show IPA)
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.
3. absolute value.
Origin of modulus
1555-1565
1555-65; < Latin: a unit of measure; see mode1, -ule
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for modulus
Historical Examples
• It will be observed that in the first process the value of the modulus is in fact calculated from the formula.

• That least distance is called by Moseley the modulus of stability.

• This modulus is found in the diameter of the column, and the standard of proportion which is based upon it is called a canon.

Georges Perrot
• Young's modulus is employed in the cases of stretching and bending.

Various
• An ear but moderately learned in that language cannot be deceived as to the rate and modulus of the suffering which it indicates.

Thomas De Quincey
• Here λ and μ are constants, each being a modulus of elasticity.

Various
• Young's contributions to this subject will be chiefly remembered in connection with his "modulus of elasticity."

William Garnett
• The modulus of ultimate resilience of the cold-rolled iron is, however, above 50 per cent.

• It is not usual now to express Young's modulus of elasticity in terms of a length of the substance considered.

William Garnett
• The most important of these are the “modulus of compression” (or “bulk modulus”) and the “rigidity” (or “modulus of shear”).

British Dictionary definitions for modulus

## modulus

/ˈmɒdjʊləs/
noun (pl) -li (-ˌlaɪ)
1.
(physics) a coefficient expressing a specified property of a specified substance See bulk modulus, modulus of rigidity, Young's modulus
2.
(maths) the absolute value of a complex number See absolute value
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 integers: 7 is a modulus of 25 and 11 See also congruence (sense 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
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modulus in Science
 modulus   (mŏj'ə-ləs)    Plural moduli (mŏj'ə-lī')A number by which two given numbers can be divided and produce the same remainder.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).The number by which a logarithm to one base must be multiplied to obtain the corresponding logarithm to another base.
The American Heritage® Science Dictionary
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