Blastulas

blas;tu;la pronunciation: function: noun inflected form(s): plural -las or blas;tu;lae etymology: new latin, from greek blastos bud — more at -blastdate: 1879 : 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;la;tion noun [blastula illustration]