- Embryology the nutritive yolk of a meroblastic ovum
- the portion of a mesoderm that gives rise to vascular and lymphatic tissues
Origin of parablastpara- + -blast
- (biology) A portion of the mesoblast (of peripheral origin) of the developing embryo, whose cells are involved in the formation of the first blood and blood vessels.
Part or all of this entry has been imported from the 1913 edition of Webster's Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
para- +"Ž -blast