gastrotrich

noun

1. any of the microscopic, multicellular animals of the class or phylum Gastrotricha, of fresh or salt waters, characterized by bands of cilia on the ventral surface of the bottle-shaped or ribbony body and by a protrusible feeding apparatus at the mouth.

noun

1. any minute aquatic multicellular animal of the phylum Gastrotricha, having a wormlike body covered with cilia and bristles