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coleoptile Line breaks: cole|op¦tile
Pronunciation: /ˌkɒlɪˈɒptʌɪl/

Definition of coleoptile in English:


A sheath protecting a young shoot tip in a grass or cereal.
Example sentences
  • Samples of roots, shoots, coleoptiles, leaves, whole seeds, endosperm, and embryos were taken at the times indicated in the Results.
  • The coleoptile and all prior sheaths surrounding the fifth leaf were removed down to the seed.
  • However, in coleoptiles, hypocotyls and epicotyls, gravity can be perceived along the whole length of the responding region and there is no such need to postulate any longitudinal transfer of a message.


Mid 19th century: from Greek koleon 'sheath' + ptilon 'feather'.

Definition of coleoptile in:

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