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.
9e. Crispus Attucks is a name synonymous with the Boston Massacre. He was not only the first African American to die for the revolution, he was one of the first patriots to give his life for the cause. American blood was shed on American soil.