a racemic mixture of hyoscyamine obtained from any of various solanaceous plants (as belladonna) and used especially in the form of its sulfate for its anticholinergic effects (as pupil dilation or inhibition of smooth muscle spasms)
poisonous crystalline alkaloid, C17H23NO3, obtained from belladonna and other plants of the nightshade family, that prevents the response of various body structures to certain types of nerve stimulation: used chiefly to re
a medicine derived from the deadly nightshade, also ATROPIN, ATROPIA [n -S]