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| a chattering or flighty, light-headed person. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
angioblast an·gi·o·blast (ān'jē-ə-blāst')
n.
A cell taking part in blood vessel formation.
The primordial mesenchymal tissue from which embryonic blood cells and vascular endothelium are differentiated. Also called vasoformative cell.