(chess) An unprotected pawn whose capture would be a losing move for the capturing player.

The European hemlock Conium maculatum, an extremely poisonous plant in the carrot family, Apiaceae / (uncountable) A lethally poisonous drink made from the plant.

(idiomatic) Something which is initially regarded as advantageous but which is later recognized to be disadvantageous or harmful; an apparently beneficial or benign instrument or scheme for causing death or harm.

A high blood level of alcohol, toxic enough to injure or kill a person.

The tree Comocladia dodonaea, whose exudate can cause contact dermatitis.

nux vomica (tree) / nux vomica (fruit)

plural of alcohol poisoning

The poisonous mushroom Entoloma sinuatum.

plural of lead poisoner

plural of poison ivy