oak apple

名词 n.

英文释义

名词 n.
  1. A spherical type of oak gall, produced by an oak gall wasp (tribe Cynipini).
    — [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.

词形变化

oak apples plural oak-apple alternative
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