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AC    音標拼音: ['es'i]
鑒別碼

鑒別碼

Ac
n 1: a radioactive element of the actinide series; found in
uranium ores [synonym: {actinium}, {Ac}, {atomic number 89}]
2: an electric current that reverses direction sinusoidally; "In
the US most household current is AC at 60 cycles per second"
[synonym: {alternating current}, {AC}, {alternating electric
current}] [ant: {DC}, {direct current}, {direct electric
current}]

electric current \electric current\, electrical current
\electrical current\,
the movement of electrically charged particles, atoms, or
ions, through solids, liquids, gases, or free space; the term
is usually used of relatively smooth movements of electric
charge through conductors, whether constant or variable.
Sudden movements of charge are usually referred to by other
terms, such as {spark} or {lightning} or {discharge}. In
metallic conductors the electric current is usually due to
movement of electrons through the metal. The current is
measured as the rate of movement of charge per unit time, and
is counted in units of amperes. As a formal definition, the
direction of movement of electric current is considered as
the same as the direction of movement of positive charge, or
in a direction opposite to the movement of negative charge.
Electric current may move constantly in a single direction,
called {direct current} (abbreviated {DC}), or may move
alternately in one direction and then the opposite direction,
called {alternating current} (abbreviated {AC}).
[PJC]


Ac \Ac\ n.
1. the chemical symbol for {actinum}, a radioactive element.

Syn: actinium
[WordNet 1.5]


AC \AC\ n. [Acronym from alternating current.]
an electric current that reverses direction sinusoidally.
Alternative to {direct curent}, {DC}. [acron.]

Syn: alternating current
[WordNet 1.5]

37 Moby Thesaurus words for "AC":
DC, absorption current, active current, alternating current,
conduction current, convection current, cycle, delta current,
dielectric displacement current, direct current,
displacement current, eddy current, electric current,
electric stream, emission current, exciting current,
free alternating current, galvanic current, high-frequency current,
idle current, induced current, induction current,
ionization current, juice, low-frequency current,
magnetizing current, multiphase current, pulsating direct current,
reactive current, rotary current, single-phase alternating current,
stray current, thermionic current, thermoelectric current,
three-phase alternating current, voltaic current, watt current

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