What is a snide, self-satisfied smile called?

What is a glowing, smoldering remnant in a dying fire called? What are snails and slugs examples of? A snake and an experimental art movement founded in 1948 share which name? What word names a sneaker and is also slang for a private investigator? Which of Snow White's seven dwarfs has a seven-letter name starting with B? Which of Snow White's dwarfs has a name that also refers to a healer? Which leader reportedly said in 1965, "Let's cool it, brothers," just before he was shot? Which publisher, whose name is still on magazines, published Mademoiselle and Glamour starting in the 1930s?