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.
Booker Taliaferro Washington (April 5, 1856 â November 14, 1915) was an American educator, author and leader of the African American community. He was freed from slavery as a child, gained an education, and as a young man was appointed to lead a teachers' college for blacks.