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coleorhiza

[koh-lee-uh-rahy-zuh, kol-ee-]
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noun, plural co·le·o·rhi·zae [koh-lee-uh-rahy-zee, kol-ee-] /ˌkoʊ li əˈraɪ zi, ˌkɒl i-/. Botany.
  1. the sheath that envelops the radicle in certain plants and that is penetrated by the root in germination.

Origin of coleorhiza

1865–70; < New Latin < Greek koleó(n) sheath, scabbard + rhíza root1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for coleorhiza

coleorhiza

noun plural -zae (-ziː)
  1. a protective sheath around the radicle in grasses

Word Origin

C19: from New Latin, from Greek koleon sheath + rhiza root
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