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has a normal one
having a normal one
normal hydrogen electrode
(physics, chemistry) Alternative name for the standard hydrogen electrode; an electrode with a standard electrode potential of zero; used as a standard against which other electrodes are measured.
fourth normal form
(databases) A stage in the normalization of a relational database in which a database is in Boyce-Codd normal form and all multi-valued dependencies are functional dependencies.
Backus normal form
first normal form
(databases) A stage in the normalization of a relational database in which repeating groups and attributes have been eliminated by putting each into a separate table connected by a primary-key/foreign-key relationship.
fifth normal form
(databases) A stage in the normalization of a relational database in which a database is in fourth normal form and every join dependency is implied by the candidate keys.
third normal form
(databases) A stage in the normalization of a relational database in which a database is in second normal form and all non-key attributes are mutually independent (no transient dependencies.)
second normal form
(databases) A stage in the normalization of a relational database in which it is in first normal form and every non-key attribute is dependent upon the entire primary key.
prenex normal form
(logic) A way of expressing a formula of predicate logic such the formula consists of a prenex and a matrix, with the prenex preceding the matrix.