Dictionary » V » Vacuum



Origin: L, fr. Vacuus empty. See Vacuous.

1. (Science: physics) A space entirely devoid of matter (called also, by way of distinction, absolute vacuum); hence, in a more general sense, a space, as the interior of a closed vessel, which has been exhausted to a high or the highest degree by an air pump or other artificial means; as, water boils at a reduced temperature in a vacuum.

2. The condition of rarefaction, or reduction of pressure below that of the atmosphere, in a vessel, as the condenser of a steam engine, which is nearly exhausted of air or steam, etc.; as, a vacuum of 26 inches of mercury, or 13 pounds per square inch. Vacuum brake, a kind of continuous brake operated by exhausting the air from some appliance under each car, and so causing the pressure of the atmosphere to apply the brakes.

(Science: medicine) vacuum pan, a glass tube provided with platinum electrodes and exhausted, for the passage of the electrical discharge; a geissler tube. Vacuum valve, a safety valve opening inward to admit air to a vessel in which the pressure is less than that of the atmosphere, in order to prevent collapse. Torricellian vacuum. See Torricellian.

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Re: Is talent inherited?

... of a dog, I would be terrible at reading. If I had untreated syphillus, likewise, I would be terrible at reading. If I was born in a suffocating vacuum, I would be dead. Unless you specify the scope, the only logical answer is that it's both genetic and environmental, for one builds atop the ...

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by wildfunguy
Wed Oct 22, 2014 1:06 am
Forum: Genetics
Topic: Is talent inherited?
Replies: 38
Views: 32491

Mechanism behind Cyanobacterial Cryptobiosis?

Cyanobacteria seem able to, as a colony at least, undergo some form of cryptobiosis (well enough to survive 553 days in the vacuum of space). The only information I can find on the mechanism(s) behind this feet are that they form something called microbial mats which include coatings ...

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by NMLevesque
Fri Nov 22, 2013 5:54 pm
Forum: Microbiology
Topic: Mechanism behind Cyanobacterial Cryptobiosis?
Replies: 0
Views: 1752

Speedy Molecule

It would not affect other molecules if it were in vacuum.

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by JackBean
Sun Feb 17, 2013 10:38 pm
Forum: Molecular Biology
Topic: Speedy Molecule
Replies: 3
Views: 1781

Re: Theories - Origin of Life

... what is studied by the chaos theory. If I try to predict a precise trajectory of a little slice of, ….. lets say, polyurethane foam sucked into my vacuum cleaner, I doubt that it can be easily done. But based on the “controlling influence” of the vacuum cleaner properties and, most importantly, ...

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by Nick7
Fri Feb 24, 2012 1:31 am
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 563
Views: 1127476


... simply this test: you go to the chapel of the Holy Blood, you check the conditions (blood simply under a closed bottle of parfum, but not in the vacuum), you wait 6 months (the time you will, even 2000 years...), and you go there again... Of course, you won't be able to reproduce it: it goes ...

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by christianstrategies
Tue Feb 21, 2012 5:57 pm
Forum: Evolution
Topic: Any SOLID arguments against evolution?
Replies: 309
Views: 591893
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