Which playing card suit is represented by a trefoil, a three-leafed symbol?

What is the sudden, violent discharge of a volcano such as Vesuvius called? A suicide note that called life "a lonely street" helped inspire the lyrics to which No. 1 song of 1956? Which word for a WWII suicide pilot was the winning word of the 1993 National Spelling Bee? On a boat, a "suit" is a complete set of what? Which word names both a sulky, petulant person and a breed of pigeon? A Sumerian pictograph from about 3500 BC shows one; the oldest known are solid wooden disks made of three planks. What… What is a summary list of legal cases scheduled to be heard in court called? Who painted "A Sunday Afternoon on the Island of La Grande Jatte"?