blackout

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Related to Black-Outs: fainting

blackout

1. a momentary loss of consciousness, vision, or memory
2. a temporary electrical power failure or cut
3. Electronics a temporary loss of sensitivity in a valve following a short strong pulse
4. a temporary loss of radio communications between a spacecraft and earth, esp on re-entry into the earth's atmosphere

blackout

[′blak‚au̇t]
(communications)
(electricity)
The shutting off of power in an electrical power transmission system, either deliberately or through failure of the system.

blackout

blackoutclick for a larger image
The relationship between acceleration and time at maximum G required to produce symptoms of grayout and blackout.
i. A condition of temporary loss of vision, possibly also loss of consciousness, resulting from the effect of high and sustained positive acceleration (g) on the body. A condition that occurs at g value higher than 1 that causes gray-out. Normally, this occurs when the body is exposed to +4 and +4.5 g for about 10 seconds or more. This can be postponed slightly by using a g-suit, by crouching, or by using a reclining seat. The onset of gray-out and blackout conditions varies from individual to individual. It is also dependent on physical conditioning.
ii. The fadeout of radio communications caused by changes in the ionosphere resulting from a nuclear explosion or ionospheric disturbances.
iii. An enforced period during which all lights in an area are turned off or concealed, so as not to be visible from the air. It is one of the passive air defense measures.

blackout

A complete loss of power. See brownout.
References in periodicals archive ?
Critics then said the black-outs had been due to a lack of government investment in infrastructure.
And out in front by two after four birdies in his last five holes last night,long after most of the crowd had headed for home to see if there were any more power black-outs.
The other possibility was that the baby was accidentally dropped by Miss Grant - who had previously consulted her doctor about black-outs - as she fell downstairs after fainting.
Brown-outs and black-outs, like we saw on the East Coast in August 2003, represent a high probability event which would adversely impact 3rd quarter and full fiscal year 2006 earnings at utilities operating within the hottest regions of the country.
10-12 power conference in the island state that the nascent GCC-wide grid was helping to cut down on black-outs which were once regular in Bahrain.
The cable issues mean they are presently reliant their expensive on-island generators - and that can cause to black-outs.
She added they will be holding talks with the state company to stop further black-outs.
BUSINESS leaders in Merseyside and the North West yesterday announced the setting-up of the UK's first energy council to help the region avert the kin ds of power black-outs that have hit North Amer-ica and London.
Claire, from Northwich, developed breathlessness, dizzy spells, vomiting and black-outs just days before her death last year.
We organised raffles, black-outs, tombola stalls and bring-and-buy sales.
The ultracap's widespread use will eliminate brown-outs and, depending on the installed capacity in any particular area, there will be no more black-outs.
But demand for power during the summer of 2013 exceeded 29,000MW and resultant black-outs caused protests in addition to the unrest against MB rule.