: the parenchyma between the epidermal layers of a foliage leaf

Word History

Etymology

New Latin mesophyllum, from mes- + Greek phyllon leaf — more at blade

First Known Use

1848, in the meaning defined above

Time Traveler
The first known use of mesophyll was in 1848

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Cite this Entry

“Mesophyll.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mesophyll. Accessed 29 Mar. 2025.

Kids Definition

: the tissue of a leaf that lies between the surface layers and contains cells used for storage and carrying on photosynthesis

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