a.

1. 腐蚀性的；苛性的
   caustic soda

   苛性钠

2. 刻薄的，讥讽的，尖利刺人的
   John's always making caustic remarks about other people.

   约翰老是说些讥讽别人的刻薄话。

3. 【物】焦散的
   a caustic curve

   焦散曲线

n.[C][U]

1. 【医】腐蚀剂；【化】苛性钠
2. 【物】焦散曲线；焦散面

adj.

1. able to burn or corrode organic tissue by chemical action.
2. scathingly sarcastic.
3. Physics  formed by the intersection of reflected or refracted parallel rays from a curved surface.

n.

1. a caustic substance.
2. Physics  a caustic surface or curve.