Primarily used in chemistry and related fields for the concentration of a substance in a solution or mixture. Can also refer to the density of something in a more general sense.
Please measure the concentration of this solution.
The concentration of carbon dioxide in the atmosphere is rising.
Mathematical term for the number of elements in a set. Rare outside technical contexts.
The cardinality of a set represents the number of its elements.
We measured the concentration of the saltwater in the experiment.
This alcohol has a high concentration, so caution is needed.
Please adjust the concentration of the chemical before use.
They test the sugar concentration in the blood.
photographic density