What is a white, silky, crystalline substance extracted from the thick rootstock of a species of pepper (Piper methysticum) of the South Sea Islands; -- called also kanakin called?

methysticin — A white, silky, crystalline substance extracted from the thick rootstock of a species of pepper (Piper methysticum) of the South Sea Islands; -- called also kanakin. (Webster's 1913.)

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