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 the first casualty of the Boston massacre, in Boston, Massachusetts, and is widely considered to be the first American casualty in the American Revolutionary War.ttucks was of mixed African and Native American parentage and was descended from John Attucks, of Massachusetts who was hanged during King Philip's War. In 1750 William Brown, a slave-owner in Framingham, advertised for the return of a runaway slave named Crispus.