英语词汇“dicotyledon”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

dicotyledon

/ˌdʌɪkɒtɪˈliːd(ə)n

noun Botany

A flowering plant with an embryo that bears two cotyledons (seed leaves). Dicotyledons constitute the larger of the two great divisions of flowering plants, and typically have broad stalked leaves with net-like veins (e.g. daisies, hawthorns, oaks). Compare with monocotyledon.

Class Dicotyledoneae (or -donae, -dones; sometimes Magnoliopsida), subdivision Angiospermae.

However, it should be kept in mind that young leaves of dicotyledons are more heterogenous as to cell age, than sections of a monocotyledon leaf....

The broad differences between halophytic monocotyledons and dicotyledons have been attributed to differences in water content and hence vacuolar volume.
Besides this constitutive system, iron reductases have been described in dicotyledons and non-grass monocotyledons that reduce iron prior to uptake.

Derivatives

dicotyledonous

/ˌdʌɪkɒtɪˈliːd(ə)nəs

/ adjective ...

In the leaf axils of most dicotyledonous trees well-developed buds are present.
In many dicotyledonous leaves, parenchyma or sclerenchyma cells of the vascular bundle sheath extend to the epidermis on both leaf sides, forming the so-called bundle sheath extensions.
This type of leaf formation can be applied to monocotyledonous and dicotyledonous plants.

Origin

Early 18th century: from modern Latin dicotyledones (plural), from di- 'two' + cotyledon (see cotyledon).

单词	dicotyledon
释义	dicotyledon /ˌdʌɪkɒtɪˈliːd(ə)n / noun Botany A flowering plant with an embryo that bears two cotyledons (seed leaves). Dicotyledons constitute the larger of the two great divisions of flowering plants, and typically have broad stalked leaves with net-like veins (e.g. daisies, hawthorns, oaks). Compare with monocotyledon. Class Dicotyledoneae (or -donae, -dones; sometimes Magnoliopsida), subdivision Angiospermae. However, it should be kept in mind that young leaves of dicotyledons are more heterogenous as to cell age, than sections of a monocotyledon leaf.... The broad differences between halophytic monocotyledons and dicotyledons have been attributed to differences in water content and hence vacuolar volume. Besides this constitutive system, iron reductases have been described in dicotyledons and non-grass monocotyledons that reduce iron prior to uptake. Derivatives dicotyledonous /ˌdʌɪkɒtɪˈliːd(ə)nəs / adjective ... In the leaf axils of most dicotyledonous trees well-developed buds are present. In many dicotyledonous leaves, parenchyma or sclerenchyma cells of the vascular bundle sheath extend to the epidermis on both leaf sides, forming the so-called bundle sheath extensions. This type of leaf formation can be applied to monocotyledonous and dicotyledonous plants. Origin Early 18th century: from modern Latin dicotyledones (plural), from di- 'two' + cotyledon (see cotyledon). Rhymes cedarn, cotyledon, Eden, monocotyledon, Sweden
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dicotyledon

Derivatives

dicotyledonous

Origin

Rhymes