oak apple

English

Alternative forms

• oak-apple

Noun

oak apple (plural oak apples)

1. A spherical type of oak gall, produced by an oak gall wasp (tribe Cynipini). [from 15th c.]
   • 1665, Robert Hooke, Micrographia, section XXV:

     [T]he small Apples which I have often observ'd to grow on the leaves of an Oak call'd Oak-apples […] are nothing but the Matrices of an Insect, as I elsewhere show.

Derived terms

• Oak Apple Day

Translations

oak gall — see oak gall

References

• oak apple on Wikipedia.Wikipedia
• “oak apple”, in OneLook Dictionary Search.