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calyptrogen

American  
[kuh-lip-truh-juhn] / kəˈlɪp trə dʒən /

noun

Botany.

  1. the histogen layer that develops into the root cap.

calyptrogen British  
/ kəˈlɪptrədʒən /

noun

  1. a layer of rapidly dividing cells at the tip of a plant root, from which the root cap is formed. It occurs in grasses and many other plants

"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

Etymology

Origin of calyptrogen

1880–85; calyptro- (combining form of calyptra ) + -gen

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.