sprue

n. 浇口, 熔渣, 口炎性腹泻
【化】 浇口; 铸口; 流道
【医】 口炎性腹泻; 铸道(牙)

sprue 2

n.（名词）
The hole through which molten material is chanelled into a mold.
浇口，注入口：将熔化的材料导入铸模的开孔
The waste material filling or protruding from this hole after hardening.
熔渣：硬化后塞满开孔或从此开孔中凸出的废料
The usually plastic rod or framework that secures molded objects, such as model parts or game pieces, before their first use.
铸模：将诸如模型部件或器具零件等模制物体，在第一次使用前固定住的通常为塑料的杆条或框架

来源：
[Perhaps of Scots origin]
[Perhaps of Scots origin]