虫むしこぶ

noun

gall; cecidium

A plant growth caused by insects, mites, or other organisms. The term is technical but also used in nature guides. Synonymous with 虫癭 (ちゅうえい).

See also: 虫えい

• この葉はっぱに虫むしこぶができている。

  A gall has formed on this leaf.

• 虫むしこぶの中なかには幼よう虫ちゅうがいることが多おおい。

  There is often a larva inside a gall.