a or an; the indefinite article (when the initial sound of what will follow is unclear)

(Christianity, liturgical, law) placeholder for a particular name to be specified

Abbreviation of north. / (grammar) Abbreviation of nominative case.

Abbreviation of northern.

(fandom slang) author's note; a note appended to a work of fan fiction by its author, typically containing acknowledgments, background information, or content warnings.

(organic chemistry) the functional group that carries this prefix is attached to a nitrogen atom on the parent molecular segment

plural of N

plural of n

Chemical name for tebutam.

(grammar) Initialism of verbal noun.