( n. )
A portion of the mesoblast (of peripheral origin) of the developing embryo, the cells of which are especially concerned in forming the first blood and blood vessels.
( n. )
A portion of the mesoblast (of peripheral origin) of the developing embryo, the cells of which are especially concerned in forming the first blood and blood vessels.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012