nux vomica

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A tree (Strychnos nux-vomica) native to South and Southeast Asia, having poisonous seeds that are a source of the alkaloids strychnine and brucine.
• noun The seeds of this tree or a preparation or extract made from them.

from The Century Dictionary.

• noun The seed of Strychnos Nux-vomica (which see, under Strychnos).
• noun The tree producing the above fruit.

from the GNU version of the Collaborative International Dictionary of English.

• The seed of Strychnos Nuxvomica, a tree which abounds on the Malabar and Coromandel coasts of the East Indies. From this seed the deadly poisons known as strychnine and brucine are obtained. The seeds are sometimes called Quaker buttons.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The strychnine tree, Strychnos nux-vomica, an evergreen tree found in southeastern Asia.
• noun The fruit of Strychnos nux-vomica, which contains strychnine and brucine.
• noun A preparation made from the fruit of Strychnos nux-vomica, traditionally used as a stimulant.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a medicine made from the seeds of an Asiatic tree; contains strychnine and brucine; formerly used as a stimulant