black-headed fireworm



[fahyuh r-wurm]
  1. the larva of any of several moths, as Rhopobota naevana (black-headed fireworm), which feeds on the leaves of cranberries and causes them to wither.
  2. glowworm.

Origin of fireworm

First recorded in 1560–70; fire + worm Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018