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.
He was the first one shot. Crispus Attucks (c. 1723 â March 5, 1770), was the first of five people killed in the Boston Massacre. He has been frequently named as the first martyr for the cause of American Independence and is the only person of the five killed whose name is commonly remembered.