amalgam, dental amalgam(noun)
an alloy of mercury with another metal (usually silver) used by dentists to fill cavities in teeth; except for iron and platinum all metals dissolve in mercury and chemists refer to the resulting mercury mixtures as amalgams
a combination or blend of diverse things
"his theory is an amalgam of earlier ideas"
A combination of different things
An alloy containing mercury
Origin: amalgama, from μάλαγμα, from μαλάσσω, from μαλακός.
an alloy of mercury with another metal or metals; as, an amalgam of tin, bismuth, etc
a mixture or compound of different things
a native compound of mercury and silver
Origin: [F. amalgame, prob. fr. L. malagma, Gr. ma`lagma, emollient, plaster, poultice, fr. mala`ssein to make soft, fr. malako`s soft.]
An amalgam is a substance formed by the reaction of mercury with another metal. Almost all metals can form amalgams with mercury, notable exception being iron. Silver-mercury amalgams are important in dentistry, and gold-mercury amalgam is used in the extraction of gold from ore.
Chambers 20th Century Dictionary
a-mal′gam, n. a compound of mercury with another metal: any soft mixture: a combination of various elements: one of the ingredients in an alloy.—v.t. Amal′gamate, to mix mercury with another metal: to compound.—v.i. to unite in an amalgam: to blend.—n. Amalgamā′tion, the blending of different things: a homogeneous union of diverse elements.—adj. Amalgamā′tive. [L. and Gr. malagma, an emollient—Gr. malassein, to soften.]
The Standard Electrical Dictionary
(a) A combination or alloy in which one of the constituents is mercury. Usually the term is applied to an alloy of a single metal with mercury. Some metals readily form amalgams; such metals are: Gold, zinc, silver, lead and others; some, such as platinum and iron, form amalgams only under exceptional circumstances. (b) The word is also applied to compositions for application to the cushions of frictional electric machine in which cases it is often a misnomer. True amalgams used for this purpose are made as follows: (a) Tin, 1 part; Zinc, 1 part; Mercury, 2 parts (Kienmayer). (b) Tin, 2 parts; Zinc, 3 parts. (c) Tin, 3 parts; Zinc, 5 parts; Mercury, 4 parts. (d) Zinc, 1 part: Mercury, 4 parts; Mercury, 9 parts. [sic] The tin, if such is used, (formula a, b and c) is first melted, the zinc is added in successive portions. The mercury, which must be heated, is slowly poured into the melted alloy after removal of the latter from the fire, and the mixture, while making, is constantly stirred. It is kept stirred or rubbed in a mortar until cold. Sometimes it is poured into water and kept in constant agitation until cold. It is thus obtained in a granular condition, and is pounded in a mortar until reduced to powder. It must be dried and kept in tightly stopped bottles and is applied to the cushions after they have been greased. It is to be noticed that it is said that alloy (d) requires no pulverization beyond constant rubbing in a mortar as it cools. Sometimes the amalgam is shaken about in a wooden tray with chalk while cooling. The action of amalgams is not very clearly understood. Some claim that there is a chemical action, others that they simply act as conductors, others that they are more highly negative to the glass than the leather of the cushions. Graphite or sulphide of tin (mosaic gold) are sometimes used to coat the cushions; it is these that are sometimes incorrectly called amalgams.
The numerical value of amalgam in Chaldean Numerology is: 8
The numerical value of amalgam in Pythagorean Numerology is: 3
Sample Sentences & Example Usage
People have been using amalgam fillings for a very long time.
Tooth-colored composite fillings are better than ever, it used to be that they weren’t as strong or long-lasting as amalgam, but they’ve improved a lot over the last 10 to 15 years.
You are in the process of being indoctrinated. We have not yet evolved a system of education that is not a system of indoctrination. We are sorry, but it is the best we can do. What you are being taught here is an amalgam of current prejudice and the choices of this particular culture. The slightest look at history will show how impermanent these must be. You are being taught by people who have been able to accomodate themselves to a regime of thought laid down by their predecessors. It is a self-perpetuating system. Those of you who are more robust and individual than others, will be encouraged to leave and find ways of educating yourself-educating your own judgement. Those that stay must remember, always and all the time, that they are being moulded and patterned to fit into the narrow and particular needs of this society.
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