laktosen is the masculine singular definite of laktose.

laktoseN

Kven

laktoosiN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:2337Edit on GitHub Suggest

laktosaN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:174990Edit on GitHub Suggest

Case	Sg	Pl
Indef	laktose	laktoser
Def	laktosen	laktosene