Definition of coleorhiza in English:

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Pronunciation: /ˌkɒlɪə(ʊ)ˈrʌɪzə/

noun (plural coleorhizae /ˌkɒlɪə(ʊ)ˈrʌɪziː/)

A sheath protecting the root of a germinating grass or cereal grain.
Example sentences
  • Indeed, at the end of stage II, scutellum, coleoptile, coleorhiza, primary root primordium, and leaf primordia have already been reported to be present.
  • Seminal roots do not form a coleorhiza since the scutellar node tissue is already differentiated when seminal roots emerge and can easily be penetrated.
  • Longitudinal sections of the embryonic root showed that the structures that protect the rootlet, i.e. the root-cap and coleorhiza, were strongly labelled.


Mid 19th century: from koleos 'sheath' + rhiza 'root'.

For editors and proofreaders

Line breaks: coleo|rhiza

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