oak appleoak apple
A round spongy gall on an oak leaf or twig, caused by the larvae of certain gall wasps.
(plural oak apples)
- Oak gall.
- The oak-apple often contains the larvae of Braconidae and Ichneumonidae, which Von Schlechtendal (loc. sup. cit.
- Galla, oak-apple, from which comes the English "gall," meaning an excrescence on trees caused by certain insects.