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 was the killing of five colonists by British regulars on March 5, 1770. It was the culmination of tensions in the American colonies that had been growing since Royal troops first appeared in Massachusetts in October 1768 to enforce the heavy tax burden imposed by the Townshend Acts.