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
Cite this Entry
“Primitive knot.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/primitive%20knot. Accessed 4 May. 2025.
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