currant gall
noun
1- a spherical red or purple gall which forms on the leaves or male catkins of oak trees in response to the developing larva of a gall wasp. It results from eggs laid in the spring and alternates with the spangle gall.醋栗瘿。
1.1
- The wasp is Neuroterus quercusbaccarum, family Cynipidae该瘿蜂为葡萄形瘿蜂, 瘿蜂科。