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The Collaborative International Dictionary
Crotonine

Crotonine \Cro"ton*ine\ (kr?"t?n-?n), n. (Chem.) A supposed alkaloid obtained from croton oil by boiling it with water and magnesia, since found to be merely a magnesia soap of the oil.
--Watts.

Wiktionary
crotonine

n. (context organic compound dated English) A supposed alkaloid obtained from croton oil by boiling it with water and magnesia, later found to be merely a magnesia soap of the oil.