sanatoriene is the neuter plural definite of sanatorium.

sanatoriumN

Kven

sanatoriumiN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:64158Edit on GitHub Suggest

sanatoriaN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:103029Edit on GitHub Suggest

Case	Sg	Pl
Indef	sanatorium	sanatorier
Def	sanatoriet	sanatoriene