1848, in the meaning defined above
New Latin mesophyllum, from mes- + Greek phyllon leaf — more at blade
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Cite this Entry
“Mesophyll.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mesophyll. Accessed 27 Nov. 2021.
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Britannica.com: Encyclopedia article about mesophyll
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