1. A small animal with a longish soft body (usually with no legs) and no bones that wiggles around on plants or on or in the ground.
2. A small animal with a long thin body, no bones, and no legs, which lives in the soil. English = worm.
3. A small worm-like animal that feeds on plants and eventually develops into a butterfly or moth. English = caterpillar.
4. A young insect which has just come out of an egg and looks like a short fat worm. English = grub.