head fold
noun
Definition of head fold
: an anterior thickening of the blastoderm immediately anterior to the neural plate of an amniotic embryo from which the anterior part of the body develops
Explore M-W
There's more!
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Seen and Heard
What made you want to look up head fold? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!