mesoblast

[ mez-uh-blast, mes-, mee-zuh-, -suh- ]

noun

, Embryology.

1. the mesoderm.
2. the primordial middle layer of a young embryo before the segregation of the germ layers, capable of becoming the mesoderm.

mesoblast

/ ˈmɛsəʊˌblæst /

noun

1. another name for mesoderm

Derived Forms

• ˌmesoˈblastic, adjective

Other Words From

• meso·blastic adjective

Word History and Origins

Origin of mesoblast¹

First recorded in 1855–60; meso- + -blast

Example Sentences

The micromeres give rise to the ectoderm; each of the sixteen macromeres, after budding off a small mesoblast cell, passes on as endoderm.

From Project Gutenberg

Hertwig says that all the cells of the epiblast, hypoblast, mesoblast, and of the later derivatives of these primary layers, receive identical portions of germplasm by means of doubling nuclear divisions.

From Project Gutenberg

The segmentation is of the mesoblast to begin with, and appears later behind the mouth, the part anterior to this becoming the prostomium of the adult.

From Project Gutenberg

We have further to note that in the embryos of Metazoa at all advanced in organization, there arises between these two layers a third—the mesoblast.

From Project Gutenberg

It is due to an arrest of development, whereby the closure of the primary medullary groove and the ingrowth of the mesoblast to form the spines and laminæ fail to take place.

From Project Gutenberg