coleoptile
中文解釋
wordnet sense
Collocation Usage
Collins Definition
Noun
coleoptiles, plural;
/ˌkōlēˈäpˌtīl/,
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coleoptiles, plural;
-
A sheath protecting a young shoot tip in a grass or cereal
Web Definitions:
- Coleoptile is the pointed protective sheath covering the emerging shoot in monocotyledons such as oats and grasses. Coleoptiles have two vascular bundles, one on either side. ...
- A protective cylindrical sheath-like structure that surrounds the shoot apex in cereal and grass embryos.
- A sheathlike structure enclosing the shoot of a grass seedling.
- The covering of the young shoot of the embryo of a grass seed.
- The first leaf following the cotyledon of a monocotyledon which forms a protective sheath around the plumule.