primitive knot

noun

: a knob of cells at the anterior end of the primitive streak that is the point of origin of the embryonic head process see tail bud

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Cite this Entry

“Primitive knot.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/primitive%20knot. Accessed 31 Mar. 2023.

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