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protophloem

American  
[proh-tuh-floh-em] / ˌproʊ təˈfloʊ ɛm /

noun

Botany.

  1. the part of the primary phloem that develops first, consisting of narrow, thin-walled cells.

protophloem Scientific  
/ prō′tə-flō′ĕm′ /

  1. The first formed phloem that differentiates from the procambium.

Etymology

Origin of protophloem

First recorded in 1880–85; proto- + phloem

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.