- any of the slender, hard-bodied, wormlike larvae of click beetles, that often live underground and attack the roots of crops
- a millipede (genus Julus)
- a roundworm (Haemonchus contortus) parasitic in the stomach and small intestine of cattle and sheep
- The yellowish hard-bodied larva of various click beetles that feeds on the roots and seedlings of many crop plants.
- Any of various millipedes.