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Heavy Metal

According to the International Union of Pure and Applied Chemistry or IUPAC, the term "heavy metal" may be a "meaningless term" because there is no standardised definition.

In practice, many people use the term to refer to any metallic element which is toxic and which has a high density, specific gravity or atomic weight.

Heavy metals included in this defintion are lead, mercury and cadmium.

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This glossary is designed to explain some of the jargon and gobbledygook used by some people when they talk about autism or research..

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The fact that an intervention is listed in this glossary does not necessarily mean that we agree with its use. Nor does it necessarily mean that there is any scientifically valid or reliable evidence behind it.