(law) The most serious offence of a group of offenses that a person committed at the same time, or is charged with committing at the same time.

(Britain, education) A formal, obligatory kind of school that typically begins with nursery school or first grade and ends at fifth or sixth grade.

plural of primary offense

plural of primary school

Energy in a form that has not been processed or is not processed before utilization.

(chemistry) Any alcohol of general formula R-CH₂-OH

Data that has been compiled for a specific purpose, and has not been collated or merged with other data.

plural of primary amine

(computing, databases) In the design of a database table, the primary key (abbreviated PK) is selected among the non-empty set of candidate keys. The PK is a column (or an irreducible group of columns) able to identify every row of the table.

plural of primary key