noun
1. : any of several beetles whose larvae bore in the wood or pith of the grapevine: as
a. : a small beetle ( Xylobiops basilaris ) whose larva bores in the stems
b. : a small reddish brown weevil ( Ampeloglypter sesostris ) that produces galls on the branches — see wound gall
2. : a clearwing moth ( Memythrus polistiformis ) whose larva bores often destructively in the roots of the grapevine