pro·​to·​xy·​lem ˌprō-tə-ˈzī-ləm How to pronounce protoxylem (audio)
: the first-formed xylem developing from procambium and consisting of narrow cells with annular, spiral, or scalariform wall thickenings

Word History

First Known Use

1887, in the meaning defined above

Time Traveler
The first known use of protoxylem was in 1887

Dictionary Entries Near protoxylem

Cite this Entry

“Protoxylem.” Dictionary, Merriam-Webster, Accessed 8 Dec. 2023.

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