| Answer | Crossword Clue |
|---|---|
| NICOTINE | Toxic substance in tobacco |
| nicotine | toxic liquid alkaloid found in tobacco |
| VENIN | Toxic substance in a snake's fluid |
| VENIN | Toxic substance in the venom of poisonous snakes |
| ciguatera | poisoning caused by the ingestion of various normally edible tropical fish in whose flesh a toxic substance (as one produced by some dinoflagellates) has accumulated |
| psoralen | toxic substance, C11H6O3, found in certain plants, including parsnips, used to increase the response to ultraviolet light in the treatment of severe cases of acne and psoriasis |
| TAR | Substance in tobacco smoke. |
