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In my view, the Christian religion is the most important and one of the first things in which all children, under a free government ought to be instructed... No truth is more evident to my mind than that the Christian religion must be the basis of any government intended to secure the rights and privileges of a free people.
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1828 Noah Webster Dictionary
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1828.mshaffer.com › Word [vacuum]

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vacuum

VAC'UUM, n. [L.] Space empty or devoid of all matter or body. Whether there is such a thing as an absolute vacuum in nature, is a question which has been much controverted. The Peripatetics assert that nature abhors a vacuum.

Torricellian vacuum, the vacuum produced by filling a tube with mercury, and allowing it to descend till it is counterbalanced by the weight of the atmosphere, as in the barometer invented by Torricelli.


Evolution (or devolution) of this word [vacuum]

1828 Webster1844 Webster1913 Webster

VAC'UUM, n. [L.] Space empty or devoid of all matter or body. Whether there is such a thing as an absolute vacuum in nature, is a question which has been much controverted. The Peripatetics assert that nature abhors a vacuum.

Torricellian vacuum, the vacuum produced by filling a tube with mercury, and allowing it to descend till it is counterbalanced by the weight of the atmosphere, as in the barometer invented by Torricelli.

VAC'U-UM, n. [L.]

Space empty or devoid of all matter or body. Whether there is such a thing as an absolute vacuum in nature, is a question which has been much controverted. The Peripatetics assert that nature abhors a vacuum. Torricellian vacuum, the vacuum produced by sufficiently filling a tube with mercury, and allowing it to descend till it is counterbalanced by the weight of the atmosphere, as in the barometer invented by Torricelli.


Vac"u*um
  1. 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. -- Vacuum pan (Technol.), a kind of large closed metallic retort used in sugar making for boiling down sirup. It is so connected with an exhausting apparatus that a partial vacuum is formed within. This allows the evaporation and concentration to take place at a lower atmospheric pressure and hence also at a lower temperature, which largely obviates the danger of burning the sugar, and shortens the process. -- Vacuum pump. Same as Pulsometer, 1. -- Vacuum tube (Phys.), 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 under Torricellian.

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Vacuum

VAC'UUM, noun [Latin] Space empty or devoid of all matter or body. Whether there is such a thing as an absolute vacuum in nature, is a question which has been much controverted. The Peripatetics assert that nature abhors a vacuum

Torricellian vacuum the vacuum produced by filling a tube with mercury, and allowing it to descend till it is counterbalanced by the weight of the atmosphere, as in the barometer invented by Torricelli.

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Word of the Day

importance

IMPORT'ANCE, n.

1. Weight; consequence; a bearing on some interest; that quality of any thing by which it may affect a measure, interest or result. The education of youth is of great importance to a free government. A religious education is of infinite importance to every human being.

2. Weight or consequence in the scale of being.

Thy own importance know.

Nor bound thy narrow views to things below.

3. Weight or consequence in self-estimation.

He believes himself a man of importance.

4. Thing implied; matter; subject; importunity. [In these senses, obsolete.]

Random Word

loiterer

LOIT'ERER, n. A lingerer; one that delays or is slow in motion; an idler; one that is sluggish or dilatory.

Ever listless loiterers, that attend no cause, no trust, no duty and no friend.

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