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.
...in 1770, Crispus Attucks, a black man from Framingham, and four other civilians were shot dead by British soldiers. Attucks worked on whaling ships and, between voyages, as a semi-skilled laborer around the port of Boston.