slovodefinícia
ball lightning
(encz)
ball lightning,kulový blesk
Ball lightning
(gcide)
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]
ball lightning
(gcide)
Fireball \Fire"ball`\, n.
1. (Mil.) A ball filled with powder or other combustibles,
intended to be thrown among enemies, and to injure by
explosion; also, to set fire to their works and light them
up, so that movements may be seen.
[1913 Webster]

2. A rare phenomenon often associated with or caused by
lightning, resembling a luminous ball of fire passing
rapidly through the air or along solid objects, then
disappearing, and sometimes exploding. It seldom lasts
more than a few seconds. Also called ball lightning,
globe lightning, globular lightning, or kugelblitz.
[Webster 1913 Suppl. +PJC]

3. A large mass of fire caused by a large explosion, as of
inflammable liquids or a nuclear device. The larger
fireballs, as of nuclear explosions, rise seemingly intact
into the air and may reach high altitudes while still
glowing.
[PJC]
podobné slovodefinícia
ball lightning
(encz)
ball lightning,kulový blesk
ball lightning
(gcide)
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]Fireball \Fire"ball`\, n.
1. (Mil.) A ball filled with powder or other combustibles,
intended to be thrown among enemies, and to injure by
explosion; also, to set fire to their works and light them
up, so that movements may be seen.
[1913 Webster]

2. A rare phenomenon often associated with or caused by
lightning, resembling a luminous ball of fire passing
rapidly through the air or along solid objects, then
disappearing, and sometimes exploding. It seldom lasts
more than a few seconds. Also called ball lightning,
globe lightning, globular lightning, or kugelblitz.
[Webster 1913 Suppl. +PJC]

3. A large mass of fire caused by a large explosion, as of
inflammable liquids or a nuclear device. The larger
fireballs, as of nuclear explosions, rise seemingly intact
into the air and may reach high altitudes while still
glowing.
[PJC]

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