n.
1.(chemistry) law stating that when two elements can combine to form more than one compound the amounts of one of them that combines with a fixed amount of the other will exhibit a simple multiple relation
2.(chemistry and physics) law stating that the pressure exerted by a mixture of gases equals the sum of the partial pressures of the gases in the mixture
Idiom of the Day
shape up
to improve one's behavior or performance or physical shape
The man has begun to shape up and is doing his job much better.