an·gio·blast noun \ˈan-jē-ə-ˌblast\
: one of the extraembryonic mesenchyme cells that differentiate into the endothelium of the embryonic blood vessels
: the mesenchymal tissue that gives rise to embryonic blood cells and blood vessels
—an·gio·blas·tic \ˌan-jē-ə-ˈblas-tik\ adjective
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