[koh-lee-uh-rahy-zuh, kol-ee-]
noun, plural coleorhizae [koh-lee-uh-rahy-zee, kol-ee-] . Botany.
the sheath that envelops the radicle in certain plants and that is penetrated by the root in germination.

1865–70; < Neo-Latin < Greek koleó(n) sheath, scabbard + rhíza root1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
coleorhiza (ˌkɒlɪəˈraɪzə)
n , pl -zae
a protective sheath around the radicle in grasses
[C19: from New Latin, from Greek koleon sheath + rhiza root]

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