[ mid-rib ]
/ ˈmɪdˌrɪb /

noun Botany.

the central or middle rib of a leaf.

Origin of midrib

First recorded in 1690–1700; mid- + rib1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for midrib

British Dictionary definitions for midrib

/ (ˈmɪdˌrɪb) /


the main vein of a leaf, running down the centre of the blade
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for midrib

[ mĭdrĭb′ ]

The central or main vein of a leaf, as in eudicots, magnoliids, and ferns. Midribs generally protrude from the underside of leaves with pinnate venation. See more at venation.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.