gall wasp
Any insect of the family Cynipidae; a rare term in everyday Japanese, mostly encountered in biological contexts.
Gall wasps are known for creating galls on plants.
Standard kanji spelling for gall wasp; 没食子 refers to oak galls.
Alternate kanji spelling using 五倍子 (gallnut); less common than 没食子蜂.
From 没食子, “gallnut,” and 蜂, “wasp,” naming the insect for the plant galls produced by its larvae. The reading ふし reflects the native word 五倍子 for such galls.