yolk-sac placenta

noun

: a structure in some sharks resembling a placenta, consisting of the vascular embryonic yolk sac wall intimately associated with the vascular maternal uterine or oviducal wall, and serving to nourish the embryo

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Dictionary Entries Near yolk-sac placenta

Cite this Entry

“Yolk-sac placenta.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/yolk-sac%20placenta. Accessed 4 Oct. 2022.

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