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 the 20-year interval between his escape from slavery and his death at the hands of British soldiers, Attucks probably spent a good deal of time aboard whaling ships. All that is definitely known about him concerns the Boston Massacre on March 5, 1770. Toward evening that day, a crowd of colonists gathered and began taunting a small group of British soldiers.