# 砷
## Noun (N)
### Sense: a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar
- ธาตุอาร์ซีนิก
- สารหนู
- เลขอะตอม 33
### Sense: a poisonous colorless flammable gas used in organic synthesis and to dope transistors and as a poison gas in warfare
- อาร์ซีน