🇨🇳Chinese Source WordCode: ZH

外胚层

Pronunciation / Transliteration: wài pēi céng

🇬🇧 Direct English Meaning:
Ectoderm/ˈɛk.tə.dɜːrm/
nounCEFR B2 (Upper)Top #15000 frequency
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🇨🇳 Example Sentence in Chinese:

"外胚层是胚胎中的外层细胞。"

Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    The outermost layer of cells or tissue in an embryo, which develops into the skin and nervous system.

    "During embryonic development, the ectoderm forms the outer layer of the skin."
  2. 2

    A layer of cells in certain organisms that gives rise to various structures, including the epidermis and nervous tissue.

    "In amphibians, the ectoderm is responsible for forming the skin and the neural tube."

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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

The term 'ectoderm' is derived from the Greek roots 'ektos', meaning 'outside', and 'derma', meaning 'skin'. It was first used in the late 19th century in biological contexts to describe the outermost layer of cells in an embryo, which eventually develops into the skin and nervous system.

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