New feature: Word discoveries, adding to my vocabulary

Word discovery: fungible
Citation: “Debunking Financial Urban Myths”, AOL Personal Finance, Myth No. 5, second paragraph, third sentence.
Usage: “…gasoline is what's known as a fungible commodity…” [color font mine]
Meaning: adjective, “of goods or commodities; freely exchangeable for or replaceable by another of like nature or kind in the satisfaction of an obligation” from OneLook Dictionary Search.
Comment: I'm not sure how often I would use this word, but it's interesting to know. I have written and edited for business for 25 years, and this is the first time I have seen this word. Have you seen it before?