Which word means both a deep shade of black and a plane like the 747?

How many sides does a decagon have? The State Hermitage Museum, one of the world's largest art museums, is in which city? Pressure from which ruler led to the dissolution of the thousand-year-old Holy Roman Empire in 1806? Which word means both a deep guttural sound and slang for a U.S. infantryman? A deep-space probe launched in 1987 left which hero frozen in suspended animation until the 25th century? Which color is a deep violet-blue? In "Do-Re-Mi", what is "a deer, a female deer"? A defeated Russia became part of which Asian empire in the mid-1200s?