![barbasco barbasco](https://www.tekportal.net/wp-content/uploads/2019/01/barbasco-1651.jpg)
noun, plural bar·bas·cos.
- a shrub or small tree, Jacquinia barbasco, of tropical America, the source of a substance used to stun fish so they can be caught easily.
- any similar plant yielding a substance that stuns or kills fish.
- the fish-stunning or fish-killing substance obtained from these plants.