lakselusen is the masculine singular definite of lakselus.

lakselusN

North Sámi

luossadihkkiN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:3516Edit on GitHub Suggest

Case	Sg	Pl
Indef	lakselus	lakseluser
Def	lakselusen / lakselusa	lakselusene