Share this entry

blastula Line breaks: blas|tula
Pronunciation: /ˈblastjʊlə/

Definition of blastula in English:

noun (plural blastulae ˈblastjʊliː or US blastulas)

An animal embryo at the early stage of development when it is a hollow ball of cells.
Example sentences
  • With time, cells gradually become determined, so that similar cells taken from later-stage blastulas and early gastrulas develop according to their fate at the time of transplantation.
  • Gastrulation in its broadest sense is the reorganization of the cells of the blastula to form a multilayered embryo, the gastrula.
  • Embryos treated at lower concentrations showed delayed gastrulation and those treated at higher concentrations developed to blastulae having abnormal blastocoels with excess cells.


Late 19th century: modern Latin, from Greek blastos 'sprout'.

Definition of blastula in:

Share this entry


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day whippersnapper
Pronunciation: ˈwɪpəsnapə
a young, inexperienced person considered presumptuous or overconfident...