cacodyl
/ˈkækəˌdaɪl/
noun
- A poisonous, foul-smelling liquid compound containing arsenic, used in some chemical research.
- The chemist handled cacodyl with extreme care because of its toxicity.
- Cacodyl has a strong, unpleasant odor that can be detected even in tiny amounts.
- Early experiments with cacodyl helped scientists understand organometallic compounds.