a.

1. 腐蝕性的；苛性的
   caustic soda

   苛性鈉

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

   約翰老是說些譏諷別人的刻薄話。

3. 【物】焦散的
   a caustic curve

   焦散曲線

n.[C][U]

1. 【醫】腐蝕劑；【化】苛性鈉
2. 【物】焦散曲線；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.