| 释义 |
coleorhizaenUK
co·le·o·rhi·za C0473700 (kō′lē-ə-rī′zə, kŏl′ē-)n. pl. co·le·o·rhi·zae (-zē) A protective sheath enclosing the embryonic root of grasses.
[New Latin : Greek koleon, sheath; see kel- in Indo-European roots + Greek rhiza, root; see wrād- in Indo-European roots.]coleorhiza (ˌkɒlɪəˈraɪzə) or coleorrhizan, pl -zae (-ziː) (Botany) a protective sheath around the radicle in grasses[C19: from New Latin, from Greek koleon sheath + rhiza root]co•le•o•rhi•za (ˌkoʊ li əˈraɪ zə, ˌkɒl i-)
n., pl. -zae (-zē). the sheath that encloses the primary root in embryonic grasses. [1865–70; < New Latin < Greek koleó(n) sheath, scabbard + rhíza root1] ColeorhizaenUK
coleorhiza[‚kō·lē·ə′rīz·ə] (botany) The sheath surrounding the radicle in monocotyledons. Coleorhiza a calyptrate sheath that surrounds the primary root, enclosed in the seed of a plant. It performs a protective function. The coleorhiza is characteristic of cereal grains; it is also present in eucalypti. The growing rootlets rupture the seed (caryopsis), causing it to sprout. coleorhizaenUK
coleorhiza a structure similar to the COLEOPTILE but located around the radicle of young seedlings. |