Definition of coleorhiza in English:

coleorhiza

nounPlural coleorhizae

Botany
  • A sheath protecting the root of a germinating grass or cereal grain.

    • ‘The coleoptile and coleorhiza are sheaths that enclose the apical meristem of the shoot and root respectively.’
    • ‘Indeed, at the end of stage II, scutellum, coleoptile, coleorhiza, primary root primordium, and leaf primordia have already been reported to be present.’
    • ‘Longitudinal sections of the embryonic root showed that the structures that protect the rootlet, i.e. the root-cap and coleorhiza, were strongly labelled.’
    • ‘Coleoptiles and coleorhizae are found only in grasses.’
    • ‘Seminal roots do not form a coleorhiza since the scutellar node tissue is already differentiated when seminal roots emerge and can easily be penetrated.’
    covering, cover, case, casing, envelope, sleeve, wrapper
    View synonyms

Origin

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

Pronunciation

coleorhiza

/ˌkɒlɪə(ʊ)ˈrʌɪzə/