parablast

parablast

English

Etymology

para- +‎ -blast

Noun

parablast (plural parablasts)

1. (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.
   • 1897, Charles Sedgwick Minot, Human Embryology:

     The study of the relations of the' wall in the chick induced him to think that the elements of the white yolk he came parablast cells; moreover, the study of the hen's ovary led him to the conclusion that the white yolk was developed from the granulosa cells, and that these cells arise from leucocytes.

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 The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for parablast in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913)