
1) Amazon muscle relaxant
Found on
https://www.crosswordclues.com/clue/curari

• (n.) 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.
Found on
http://thinkexist.com/dictionary/meaning/curari/

Curari, also known as curara, urara and woorali is a well-known arrow-poison of the Indians in Spanish Guiana and in Northern Brazil. It is the aqueous extract of a tree, the Stryrchnos toxifera, thickened with mucilaginous matter; and its properties are such that if introduced into a scratch or puncture of the skin, so as to mix with the blood, it...
Found on
http://www.probertencyclopaedia.com/browse/FC.HTM
No exact match found.