1. (noun) a poisonous crystalline alkaloid extracted from the nightshade family; used as an antispasmodic and to dilate the eye pupil; also administered in large amounts as an antidote for organophosphate nerve agents or organophosphate insecticides

• alkaloid
• antidote
• counterpoison
• antispasmodic
• antispasmodic agent
• spasmolytic
• mydriatic
• mydriatic drug
• poison
• poisonous substance
• toxicant

1. (noun) a poisonous crystalline alkaloid extracted from the nightshade family; used as an antispasmodic and to dilate the eye pupil; also administered in large amounts as an antidote for organophosphate nerve agents or organophosphate insecticides

• belladonna