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词汇 ecdysis
释义

Definition of ecdysis in English:

ecdysis

noun ˈɛkdɪsɪsɛkˈdʌɪsɪsˈɛkdəsəs
mass nounZoology
  • The process of shedding the old skin (in reptiles) or casting off the outer cuticle (in insects and other arthropods).

    〔动〕蜕皮

    Example sentencesExamples
    • Upon ecdysis, a chitinous duplicature of the exoskeleton is shed and a growth band is added to the valves.
    • At ecdysis, the animal sheds the old exoskeleton while absorbing large quantities of water to stretch the new exoskeleton.
    • During terminal pleateau there are a series of large pulses of circulating ecdysteroids which appear to be necessary for successful ecdysis of the entire exoskeleton.
    • Considering Crustacea as an analogy, abnormal secretion of exuviation hormones in trilobite exoskeletons could also have caused irregular ecdysis and given rise to aberrant exoskeletal morphology.
    • In both groups, tissue loss must occur before a critical period to permit regeneration before the next ecdysis and proecdysial processes are suspended during regeneration in order to maintain proper timing of events.

Derivatives

  • ecdysial

  • adjective ɛkˈdɪzɪəl
    Zoology
    • Passonneau and Williams have described in the developing cecropia silkworm an 'ecdysial membrane' situated between pupal and adult cuticles.
      Example sentencesExamples
      • The ecdysial suture is the region of the arthropod exoskeleton that splits to allow the animal to emerge during ecdysis.

Origin

Mid 19th century: from Greek ekdusis, from ekduein 'put off', from ek- 'out, off' + duein 'put'.

Definition of ecdysis in US English:

ecdysis

nounˈekdəsəsˈɛkdəsəs
Zoology
  • The process of shedding the old skin (in reptiles) or casting off the outer cuticle (in insects and other arthropods).

    〔动〕蜕皮

    Example sentencesExamples
    • During terminal pleateau there are a series of large pulses of circulating ecdysteroids which appear to be necessary for successful ecdysis of the entire exoskeleton.
    • In both groups, tissue loss must occur before a critical period to permit regeneration before the next ecdysis and proecdysial processes are suspended during regeneration in order to maintain proper timing of events.
    • At ecdysis, the animal sheds the old exoskeleton while absorbing large quantities of water to stretch the new exoskeleton.
    • Upon ecdysis, a chitinous duplicature of the exoskeleton is shed and a growth band is added to the valves.
    • Considering Crustacea as an analogy, abnormal secretion of exuviation hormones in trilobite exoskeletons could also have caused irregular ecdysis and given rise to aberrant exoskeletal morphology.

Origin

Mid 19th century: from Greek ekdusis, from ekduein ‘put off’, from ek- ‘out, off’ + duein ‘put’.

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