blastula

noun blas·tu·la \ˈblas-chə-lə\

plural -las or blas·tu·lae \-ˌlē\

Medical Definition of BLASTULA

: an early metazoan embryo typically having the form of a hollow fluid-filled rounded cavity bounded by a single layer of cells—compare gastrula, morula

—blas·tu·lar \-lər\ adjective

—blas·tu·la·tion \ˌblas-chə-ˈlā-shən\ noun

Illustration of BLASTULA

Learn More About

Dictionary: Definition of "blastula"

Browse

Seen & Heard

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

View Seen & Heard Highlights from Around the Site

Test Your Vocabulary!

10 Charming Words for Nasty People

Put-downs with flair

Learn More

When "Literally" isn't, well, literal

How to use a word that (literally) drives some people nuts.

Watch Now

Know what this is?

Test your vocab with our fun, fast game

Go Play

Fear of cats?

Ailurophobia, and 9 other unusual fears

Learn More