tuben is the masculine singular definite of tube.

tubeN

Kven

tuubiN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:10462Edit on GitHub Suggest

bohccádatN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:234260Edit on GitHub Suggest

Case	Sg	Pl
Indef	tube	tuber
Def	tuben	tubene