mulm
Noun. The sludge that collects at the bottom of an aquarium, consisting of fish excrement, decaying plant matter, and other assorted dreck.This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.
This entry was last updated on RefTopia from its source on 3/20/2012.