Pronunciation: (strik'nin, -nēn, -nīn),[key] —n. 1. Pharm.a colorless, crystalline poison, C21H22N2O2, obtained chiefly by extraction from the seeds of nux vomica, formerly used as a central nervous system stimulant.
2. an Indian tree, Strychnos nux-vomica, of the logania family, having small, yellowish-white flowers in clusters, berrylike fruit, and seeds that yield strychnine. Also,strych•ni•aPronunciation: (strik'nē-u),[key]strych•ni•naPronunciation: (strik'ni-nu).[key]