blastula
1. [ noun ] (zoology,embryology) early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs
Synonyms: blastodermic_vesicle blastosphere
Related terms: embryo blastocyst blastocoel
Similar spelling:   blastular
  blast
  blastoma
  blastema
  Blust
  blest
  blastemal
  blast_wave
  blaster
  blasted
  blastocyst
  blastocoel
  blastematic
  bluestem
  blastoporal
  blastoff
  blasting