最終更新日：2024/08/02

(embryology) A formation that occurs during the initial phases of embryonic development in birds, reptiles and mammals.

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primitive streak

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primitive streak

noun

(embryology) A formation that occurs during the initial phases of embryonic development in birds, reptiles and mammals.

The primitive streak is a key feature in embryonic development.

意味（1）

(embryology) A formation that occurs during the initial phases of embryonic development in birds, reptiles and mammals.