ˈt(y)übəˌfeks noun
Etymology: New Latin Tubific-, Tubifex, from tubi- + Latin -fic-, -fex (from facere to make, do) — more at do
1. capitalized : a genus (the type of the family Tubificidae) of slender red or brown oligochaete worms having four bundles of setae on each segment and living in tubes in fresh or brackish water and being widely used as food for aquarium fish
2. plural tubifex or tubifexes : any worm of the genus Tubifex