probably from French oolithe, from oo- o- + -lithe -lite
1785, in the meaning defined above
oolachan
oolite
oolitic limestone
“Oolite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oolite. Accessed 19 Aug. 2024.
Britannica.com: Encyclopedia article about oolite
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