indeksen is the masculine singular definite of indeks.

indeksN

Kven

indeksiN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:86611Edit on GitHub Suggest

indeaksaN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:178759Edit on GitHub Suggest

Case	Sg	Pl
Indef	indeks	indekser
Def	indeksen	indeksene