Moria Password in Lord of the Rings

This page is the CodyCross answer for the clue below from Renaissance, Group 1399, Puzzle 4 (Andreas Vesalius).

Question is: Moria Password in Lord of the Rings

and the answer is: MELLON

Word Meaning:

MELLON — (rare, chemistry) The result of heptazine being polymerized with the tri-s-triazine units linked through an amine (NH) link.

Definitions from Wiktionary.