1) Glowworm 
• (n.) 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.
any of certain segmented marine worms of the class Polychaeta (phylum Annelida), including species of the genera Hermodice and Eurythoe. Fireworms ... [2 related articles]
Fire'worm` noun (Zoology) 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 . 
the larva of any of several moths, as Rhopobota naevanawhich feeds on the leaves of cranberries and causes them to wither. · glowworm.