(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.

plural of spit-poison

(obsolete, derogatory) A malicious person.

plural of rat poison

Poison used to kill rats and other rodents. / A West African shrub (Dichapetalum toxicarium, syn. Chailletia toxicaria), whose seeds are used to destroy rats.

(feng shui) A sharp object pointing toward something (e.g., toward a door, or a person), believed to disrupt the flow of energy and have harmful effects.

plural of poison arrow

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

nux vomica (tree) / nux vomica (fruit)