borrowed from New Latin crenātus, probably Latinization of Middle French crené, past participle of crener "to mark with a notch," derivative of cren, cran "notch" — more at crenellated
1688, in the meaning defined above
“Crenate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/crenate. Accessed 9 Dec. 2022.
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