1. A small, freshwater fish (family Catostomidae) that has a protrusible mouth with which it sucks up food from a riverbed. There are 14 genera with about 78 species, most found in North America but one also in Russia and one only in China.
2. An underground plant shoot that arises from the lower stem or root of a woody plant and that forms a new plant, at first nourished by the parent but later independent.
3. An organ with which an animal anchors itself to a substrate.
4. A circular, cup-like, muscular appendage on the tentacle of a cephalopod (cuttlefish, octopus, or squid) with which the animal grasps solid surfaces, catches prey, or moves across a surface.