Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

gastrula

play
noun gas·tru·la \ˈgas-trə-lə\

Definition of gastrula

plural

gastrulas

or

gastrulae

play \-ˌlē, -ˌlī\
  1. :  an early metazoan embryo in which the ectoderm, mesoderm, and endoderm are established either by invagination of the blastula (as in fish and amphibians) to form a multilayered cellular cup with a blastopore opening into the archenteron or by differentiation of the blastodisc (as in reptiles, birds, and mammals) and inward cellular migration — compare blastula, morula

gastrular

play \-lər\ adjective


Origin and Etymology of gastrula

New Latin, from gastr-


First Known Use: 1876


Medical Dictionary

gastrula

play
noun gas·tru·la \ˈgas-trə-lə\

Medical Definition of gastrula

plural

gastrulas

or

gastrulae

\-ˌlē, -ˌlī\play play
  1. :  an early metazoan embryo in which the ectoderm, mesoderm, and endoderm are established either by invagination of the blastula (as in fish and amphibians) to form a multilayered cellular cup with a blastopore opening into the archenteron or (as in reptiles, birds, and mammals) by differentiation of the upper layer of the blastodisc into the ectoderm and the lower layer into the endoderm and by the inward migration of cells through the primitive streak to form the mesoderm—compare morula

gastrular

\-lər\play adjective



Learn More about gastrula

  1. Medical Dictionary: Definition of gastrula Britannica.com: Encyclopedia article about gastrula


Seen and Heard

What made you want to look up gastrula? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to take off or remove

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

confounded-person

Which is a synonym of indolent?

melancholy frenetic philistine lazy
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ