lightning 音标拼音: [l'ɑɪtnɪŋ]
n .
U 闪电
a . 闪电般的,快速的
U 闪电闪电般的,快速的
lightning n 1 :
abrupt electric discharge from cloud to cloud or from cloud to earth accompanied by the emission of light 2 :
the flash of light that accompanies an electric discharge in the atmosphere (
or something resembling such a flash );
can scintillate for a second or more Lightning \
Light "
ning \ (
l [
imac ]
t "
n [
i ^]
ng ),
n . [
For lightening ,
fr .
lighten to flash .]
1 .
A discharge of atmospheric electricity ,
accompanied by a vivid flash of light ,
commonly from one cloud to another ,
sometimes from a cloud to the earth .
The sound produced by the electricity in passing rapidly through the atmosphere constitutes thunder .
[
1913 Webster ]
2 .
The act of making bright ,
or the state of being made bright ;
enlightenment ;
brightening ,
as of the mental powers . [
R .]
[
1913 Webster ]
{
Ball lightning },
a rare form of lightning sometimes seen as a globe of fire moving from the clouds to the earth .
{
Chain lightning },
lightning in angular ,
zigzag ,
or forked flashes .
{
Heat lightning },
more or less vivid and extensive flashes of electric light ,
without thunder ,
seen near the horizon ,
esp .
at the close of a hot day .
{
Lightning arrester } (
Telegraphy ),
a device ,
at the place where a wire enters a building ,
for preventing injury by lightning to an operator or instrument .
It consists of a short circuit to the ground interrupted by a thin nonconductor over which lightning jumps .
Called also {
lightning discharger }.
{
Lightning bug } (
Zool .),
a luminous beetle .
See {
Firefly }.
{
Lightning conductor },
a lightning rod .
{
Lightning glance },
a quick ,
penetrating glance of a brilliant eye .
{
Lightning rod },
a metallic rod set up on a building ,
or on the mast of a vessel ,
and connected with the earth or water below ,
for the purpose of protecting the building or vessel from lightning .
{
Sheet lightning },
a diffused glow of electric light flashing out from the clouds ,
and illumining their outlines .
The appearance is sometimes due to the reflection of light from distant flashes of lightning by the nearer clouds .
[
1913 Webster ]
Lightning \
Light "
ning \ (
l [
imac ]
t "
n [
i ^]
ng ),
vb .
n .
Lightening . [
R .]
[
1913 Webster ]
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 ]
49 Moby Thesaurus words for "
lightning ":
Jupiter Fulgur ,
Thor ,
antelope ,
arrow ,
ball lightning ,
blue darter ,
blue streak ,
bolt ,
bolt of lightning ,
cannonball ,
chain lightning ,
courser ,
dark lightning ,
dart ,
eagle ,
electricity ,
express train ,
fireball ,
firebolt ,
flash ,
flying flame ,
forked lightning ,
fulguration ,
fulmination ,
gazelle ,
greased lightning ,
greyhound ,
hare ,
jet plane ,
levin bolt ,
light ,
mercury ,
oak -
cleaving thunderbolts ,
quicksilver ,
rocket ,
scared rabbit ,
sheet lightning ,
shot ,
streak ,
streak of lightning ,
striped snake ,
stroke of lightning ,
swallow ,
thought ,
thunderball ,
thunderbolt ,
thunderstroke ,
torrent ,
wind
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