In organic chemistry nomenclature
Normal alkane: A straight-chain alkane. For instance, normal pentane is the straight-chain pentane. Also written by prefix , for instance, -pentane.
The term is used more generally for organic compounds, as a prefix denoting a straight-chain structure, with functional groups at one end.
Normal solution: An aqueous solution that contains one gram-equivalent of the active reagent in 1 liter of solution.
Normality of an aqueous solution: Number of gram equivalents of the active reagent contained in 1 liter of solution.