| 释义 |
Definition of coleoptile in English: coleoptilenoun ˌkɒlɪˈɒptʌɪlˌkoʊliˈɑpˌtəl Botany A sheath protecting a young shoot tip in a grass or cereal. 〔植〕胚芽鞘 Example sentencesExamples - Samples of roots, shoots, coleoptiles, leaves, whole seeds, endosperm, and embryos were taken at the times indicated in the Results.
- In rice, the coleoptiles, leaves and stems all respond to submergence by elongating more quickly.
- 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.
- The coleoptile and all prior sheaths surrounding the fifth leaf were removed down to the seed.
- The aleurone is part of the triploid maize endosperm whereas the coleoptile, scutellum, scutellar node, and root are derived from the developing embryo.
Synonyms covering, cover, case, casing, envelope, sleeve, wrapper
OriginMid 19th century: from Greek koleon 'sheath' + ptilon 'feather'. Definition of coleoptile in US English: coleoptilenounˌkōlēˈäpˌtəlˌkoʊliˈɑpˌtəl Botany A sheath protecting a young shoot tip in a grass or cereal. 〔植〕胚芽鞘 Example sentencesExamples - 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.
- The coleoptile and all prior sheaths surrounding the fifth leaf were removed down to the seed.
- Samples of roots, shoots, coleoptiles, leaves, whole seeds, endosperm, and embryos were taken at the times indicated in the Results.
- In rice, the coleoptiles, leaves and stems all respond to submergence by elongating more quickly.
- The aleurone is part of the triploid maize endosperm whereas the coleoptile, scutellum, scutellar node, and root are derived from the developing embryo.
Synonyms covering, cover, case, casing, envelope, sleeve, wrapper
OriginMid 19th century: from Greek koleon ‘sheath’ + ptilon ‘feather’. |