Freebase(0.00 / 0 votes)Rate this definition: Hydraulic conductivity. Hydraulic conductivity, symbolically represented as, is a property of vascular plants, soil or rock, that describes the ease with which a fluid can move through pore spaces or fractures.
Crispus Attucks was an African-American man killed during the Boston Massacre, making him the first casualty of the American Revolution.
The Boston Massacre. On the cold, snowy night of March 5, 1770, a mob of American colonists gathers at the Customs House in Boston and begins taunting the British soldiers guarding the building.