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 probably the first man killed in the Boston Massacre. In the Boston Commons, there is a statute of him. After the incident, Sam Adams insisted the British troops leave Boston. The Massachusetts governor moved the soldiers to Castle William on one of the nearby islands.