primitive knot

noun

Medical Definition of primitive knot

: 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

Learn More About primitive knot

Dictionary Entries Near primitive knot

primitive groove

primitive knot

primitive pit

See More Nearby Entries 

Cite this Entry

“Primitive knot.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/primitive%20knot. Accessed 7 Dec. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!