protophloem

noun

pro·​to·​phlo·​em ˌprō-tə-ˈflō-ˌem How to pronounce protophloem (audio)
: the first-formed phloem that develops from procambium, consists of narrow thin-walled cells, and is usually associated with a region of rapid growth

Word History

First Known Use

1884, in the meaning defined above

Time Traveler
The first known use of protophloem was in 1884

Dictionary Entries Near protophloem

Protoperlaria

protophloem

Protophyta

See More Nearby Entries 

Cite this Entry

“Protophloem.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/protophloem. Accessed 28 Nov. 2023.

Copy Citation

Share

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Games & Quizzes

Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Word Game You can make only 12 words. Pick the best ones!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
Missing Letter A crossword with a twist
winning words from the national spelling bee logo
Spelling Bee Quiz Can you outdo past winners of the National Spelli...