A black resinoid extract prepared by the South American Indians from the bark of several species of Strychnos (S. toxifera, etc.). It sometimes has little effect when taken internally, but is quickly fatal when introduced into the blood, and used by the Indians as an arrow poison.

A deadly alkaloid extracted from the curare poison and from the Strychnos toxifera. It is obtained in crystalline colorless salts.

To poison with curare.