Capable of being extracted. "Thirty grains of extractive matter."
2.
Tending or serving to extract or draw out. "Certain branches of industry are conveniently designated extractive: e.g., agriculture, pastoral and mining pursuits, cutting of lumber, etc."
... taste that it is almost undrinkable. In the latter case the tea has been allowed to soak so long that it has become a decoction instead of an infusion. The consequence of this prolonged action of the hot water on the tea is that it brings out the bitter extractive material of the plant, and it is this which proves so particularly pernicious. Tea at sea is proverbially unpalatable, and invariably disagrees, owing chiefly to the fact that it is a boiled decoction of tea leaves ... — The Art of Living in Australia • Philip E. Muskett (?-1909)
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