Heard that a college professor had coined this word to mean the smallest unit of time perceivable to the human brain. Brilliant I thought, and perhaps a candidate for WWTD. The term is an eponym from the blind jazz pianist, Art Tatum. Anyone know him? I didn't until hearing about him recently. He was famous for playing horrendous numbers of accidentals between the notes of standard songbook melodies. His illustrious friends preferred to call him just plain 'God'.