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A

A   Quick reference

A Dictionary of Weights, Measures, and Units

Reference type:
Subject Reference
Current Version:
2004

Metric As a lower-case prefix a-, see atto-.

length. Metric Correctly Å, see angstrom.

area. As a, see are; see ...

a-

a-   Quick reference

A Dictionary of Weights, Measures, and Units

Reference type:
Subject Reference
Current Version:
2004

Metric As symbol see A, a.

a.u.

a.u.   Quick reference

A Dictionary of Weights, Measures, and Units

Reference type:
Subject Reference
Current Version:
2004

sub-atomic physics. See atomic unit.

aanom

aanom   Quick reference

A Dictionary of Weights, Measures, and Units

Reference type:
Subject Reference
Current Version:
2004

[annum]

time. Anomalistic year; see anomalistic and year.

aastr

aastr   Quick reference

A Dictionary of Weights, Measures, and Units

Reference type:
Subject Reference
Current Version:
2004

time. Astronomical year.

ab-

ab-   Quick reference

A Dictionary of Physics (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Physics
Length:
71 words

A prefix attached to the name of a practical electrical unit to provide a name for a unit in the electromagnetic system of units (...

abampere

abampere   Quick reference

A Dictionary of Weights, Measures, and Units

Reference type:
Subject Reference
Current Version:
2004
[absolute ampere] (biot) electric current. Symbol abA. Metric-c.g.s.-e.m.u 1 abA = the constant current that produces, when maintained in two parallel conductors of negligible ... More
abcoulomb

abcoulomb   Quick reference

A Dictionary of Weights, Measures, and Units

Reference type:
Subject Reference
Current Version:
2004

electric charge. Symbol abC. Metric-c.g.s. The absolute coulomb of the e.m.u. system, for a steady current identically s⋅abA. 1 abC = 10 C....

abdaraf

abdaraf   Quick reference

A Dictionary of Weights, Measures, and Units

Reference type:
Subject Reference
Current Version:
2004

electric elastance. Symbol abD. Metric-c.g.s. The absolute daraf of the e.m.u. system, for a steady current identically abV/abC, and identically reciprocal abfarard. 1 abD = 1 abF...

aberration

aberration   Quick reference

A Dictionary of Physics (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Physics
Length:
218 words
Illustration(s):
1
1. (in optics) A defect in the image formed by a lens or curved mirror. In chromatic aberration the image formed by a lens (but not a mirror) has coloured fringes as a result ... More
abfarad

abfarad   Quick reference

A Dictionary of Weights, Measures, and Units

Reference type:
Subject Reference
Current Version:
2004

electric capacitance. Symbol abF. Metric-c.g.s. The absolute farad of the e.m.u. system, for a steady current identically abC/abV, and identically reciprocal abdaraf. 1 abF = 1 GF....

abhenry

abhenry   Quick reference

A Dictionary of Weights, Measures, and Units

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Subject Reference
Current Version:
2004

electromagnetic inductance. Symbol abH. Metric-c.g.s. The absolute henry of the e.m.u. system, for a steady current identically abV/abA/second. 1 abH = 1 nH....

abmho

abmho   Quick reference

A Dictionary of Weights, Measures, and Units

Reference type:
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Current Version:
2004

electric conductance. Metric-c.g.s. The absolute mho of the e.m.u. system, for a steady current identically abA/abV, and identically reciprocal abΩ. 1 abmho = 1 GS....

abohm

abohm   Quick reference

A Dictionary of Weights, Measures, and Units

Reference type:
Subject Reference
Current Version:
2004

electric resistance. Symbol abΩ. Metric-c.g.s. The absolute ohm of the e.m.u. system, for a steady current identically abV/abA, and identically reciprocal abmho. 1 abΩ = 1 nΩ....

absolute

absolute   Quick reference

A Dictionary of Weights, Measures, and Units

Reference type:
Subject Reference
Current Version:
2004

Within metrology generally, the qualifier ‘absolute’ indicates using mass rather than weight, i.e. force, as a basic dimension; hence an absolute system contrasts with a ...

absolute

absolute   Quick reference

A Dictionary of Physics (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Physics
Length:
80 words

1. Not dependent on or relative to anything else, e.g. *absolute zero.

2. Denoting a temperature measured on an ...

absolute centesimal thermodynamic
 scale

absolute centesimal thermodynamic scale   Quick reference

A Dictionary of Weights, Measures, and Units

Reference type:
Subject Reference
Current Version:
2004

temperature. See kelvin scale.

absolute magnitude

absolute magnitude   Quick reference

A Dictionary of Weights, Measures, and Units

Reference type:
Subject Reference
Current Version:
2004

astronomy. Symbol M. See stellar magnitude.

absolute pitch

absolute pitch   Quick reference

A Dictionary of Physics (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Physics
Length:
24 words

The ability of a person to identify and reproduce a note without reference to a tuned musical instrument.

absolute practical system

absolute practical system   Quick reference

A Dictionary of Weights, Measures, and Units

Reference type:
Subject Reference
Current Version:
2004

electromagnetics. Metric See absolute system and practical units.

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