joint·worm noun \ˈjȯint-ˌwərm\
: the larva of any of several small chalcid wasps (genus Harmolita) that attacks the stems of grain and causes swellings like galls at or just above the first joint
First Known Use of JOINTWORM
Learn More About JOINTWORM
Seen & Heard
What made you want to look up jointworm? Please tell us where you read or heard it (including the quote, if possible).