tubercle

n.小块茎；小瘤；结节

Dens evaginatus is a developmental anomaly that produces a tubercle on the occlusal surface of a tooth. 齿外齿是一种牙齿发育的异常，在牙齿的咬合面上突起一个的结节，最常见于下颚小臼齿。

Tubercle Technology or the bumps found on the fins of a Humpback whale is the inspiration behind the wind turbine blades. 结节技术或颠簸发现鱼翅的座头鲸是灵感背后的风力涡轮叶片。