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词汇 marcescent
释义

Definition of marcescent in English:

marcescent

adjective mɑːˈsɛs(ə)ntˌmɑrˈsɛs(ə)nt
Botany
  • (of a leaf or frond) withering but remaining attached to the stem.

    〔植〕(叶子)枯萎的,凋谢但未掉落的

    Example sentencesExamples
    • After tertiary capitula ripened, cauline leaves senesced and remained marcescent on the stems.
    • Several trees normally have marcescent leaves such as oak (Quercus), beech (Fagus) and hornbeam (Carpinus).
    • There seems to be no evidence that marcescent leaves provide additional cold protection.

Derivatives

  • marcescence

  • noun
    Botany
    • Legend notwithstanding, the ecological causes and consequences of marcescence are not well understood.
      Example sentencesExamples
      • Marcescence is considered a juvenile characteristic because it is more common on younger trees and on the lower, more juvenile, parts of older trees.

Origin

Early 18th century: from Latin marcescent- 'beginning to wither', from marcere 'wither'.

Definition of marcescent in US English:

marcescent

adjectiveˌmɑrˈsɛs(ə)ntˌmärˈses(ə)nt
Botany
  • (of leaves or fronds) withering but remaining attached to the stem.

    〔植〕(叶子)枯萎的,凋谢但未掉落的

    Example sentencesExamples
    • Several trees normally have marcescent leaves such as oak (Quercus), beech (Fagus) and hornbeam (Carpinus).
    • After tertiary capitula ripened, cauline leaves senesced and remained marcescent on the stems.
    • There seems to be no evidence that marcescent leaves provide additional cold protection.

Origin

Early 18th century: from Latin marcescent- ‘beginning to wither’, from marcere ‘wither’.

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