gall
botany
- Related Topics:
- Aleppo gall
- marble gall
- bedeguar gall
- Chinese gall
- oak apple
gall, an abnormal, localized outgrowth or swelling of plant tissue caused by infection from bacteria, fungi, viruses, and nematodes or irritation by insects and mites. See black knot; cedar-apple rust; clubroot; crown gall.