nux vom·i·ca 
(nŭks vŏmĭ-kə)
(nŭks vŏmĭ-kə)n.
1. A tree (Strychnos nux-vomica) native to South and Southeast Asia, having poisonous seeds that are a source of the alkaloids strychnine and brucine.
2. The seeds of this tree or a preparation or extract made from them.
[Medieval Latin : Latin nux, nut + Medieval Latin vomica, feminine of vomicus, emetic (from Latin vomere, to vomit; see wemə- in the Appendix of Indo-European roots).]