protuberance
noun [ C ] formal uk/prəˈtʃuː.bər.əns/ us/prəˈtuː.bər.əns/
隆起部分;凸出物
something that sticks out from a surface
If the plant has been infected you will see dark protuberances along the stems. 如果这种植物感染了病菌，你会看到它的茎上出现黑色的凸出物。
medical specialized（身体部分）隆凸，突出物
a projection or swelling on a part of the body such as the chin or the eyebrow
Bunions are bony protuberances that stick out on either side of the foot. 拇趾囊肿是脚侧的骨样突出物。