noun
1. : the larva of a small clearwing moth ( Thamnosphecia pyri ) that is similar to the peach-tree borer but smaller and that bores beneath the bark of the pear
2. : the larva of a beetle ( Chrysobothris femorata ) of the family Buprestidae that attacks apple, pear, oak, and maple trees
3. : the larva of a related European beetle ( Agrilus sinuatus ) that bores under the bark making zigzag galleries