Fireworm

noun

1. A glow-worm.
2. Same as blackhead cranberry-worm.
3. The larva of a small tortricid moth which eats the leaves of the cranberry, so that the vines look as if burned; -- called also cranberry worm.
4. The larva of a small tortricid moth that feeds on cranberry leaves, giving the plant a burnt look; the cranberry worm
5. a species of polychaete which may cause pain if touched