noun, plural blas·tu·las, blas·tu·lae [blas-chuh-lee] /ˈblæs tʃəˌli/. Embryology.
Origin of blastula
Examples from the Web for blastula
In the third stage the Inner Cell-Mass separates into two layers derived from the inner cell-plate of the blastula.The Ethics of Medical Homicide and Mutilation|Austin O'Malley
Our next question concerns the distribution of potentiality, when the embryo is developed further than the blastula stage.
But there is in the blastula no trace of one part of the germ becoming different with respect to others of its parts.The Science and Philosophy of the Organism|Hans Driesch
Consider its mode of division, and the formation of the blastula, gastrula, and germinal layers.The Biological Problem of To-day|Oscar Hertwig
When the blastula is oval and free-swimming the inner mass is formed by unipolar immigration from the hinder pole.
noun plural -las or -lae (-liː)
Word Origin for blastula
embryonic state, 1875, Modern Latin, from Greek blastos "sprout, germ" + diminutive ending -ula.
n. pl. blas•tu•las
Plural blastulas blastulae (blăs′chə-lē′)
The stage of an embryo that consists of just over a hundred cells — a stage reached about one week after fertilization. At this stage the cells are just at the very beginning of cellular differentiation and are said to be totipotent (See totipotency).