a. Any of various plants of the genus Vaccinium, having white to reddish, urn-shaped or tubular flowers and edible blue to blue-black berries, especially the highbush blueberry and the lowbush blueberry.
b. The fruit of any of these plants.
2. A usually blue-gray spherule that is found in soil and sedimentary rock and is rich in hematite, produced by the weathering of rock or by precipitation from rock by moving groundwater.
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