yolk plug

noun

: a mass of yolk cells found in the blastopore of the embryos of some vertebrates

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yolk
yolk plug
yolk sac
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Cite this Entry

“Yolk plug.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/yolk%20plug. Accessed 25 May. 2025.

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