jointworm noun. ['dʒɔɪntwǝ:m] E18.
[from JOINT noun + WORM noun.]
1. A tapeworm. Only in E18.

2. (The larval form of) any of several chalcid flies of the genus Harmolita (or Tetramesa) which form galls near joints on grain stems, causing them to bend. US. M19.

[TahlilGaran] English Dictionary ▲