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coleorhiza

American

[koh-lee-uh-rahy-zuh, kol-ee-] / ˌkoʊ li əˈraɪ zə, ˌkɒl i- /

noun

Botany.

plural

coleorhizae

the sheath that envelops the radicle in certain plants and that is penetrated by the root in germination.

coleorhiza British

/ ˌkɒlɪəˈraɪzə /

noun

a protective sheath around the radicle in grasses

"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 coleorhiza

1865–70; < New Latin < Greek koleó ( n ) sheath, scabbard + rhíza root ¹

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Germination.—In germination the coleorhiza lengthens, ruptures the pericarp, and fixes the grain to the ground by developing numerous hairs.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" by Various

The sheath which envelopes the radicle is called coleorhiza and that of the plumule, pileole or germ-sheath.

From A Handbook of Some South Indian Grasses by Rangachari, K.

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