jernalderne is the masculine plural definite of jernalder.

jernalderN

Kven

rautakausiN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:61489Edit on GitHub Suggest

ruovdeáigiN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:170884Edit on GitHub Suggest

Case	Sg	Pl
Indef	jernalder	jernaldrer / jernaldere
Def	jernalderen	jernaldrene / jernalderne