Yes, unit of length. All the way down to Angstroem. (1E-10)

Every single one of those units actually have infinite precision; so yes. There are many things in the world that are measured in fractions of a cent. While uncommon in day to day commerce, it exists, and markets don't get confused. When USD was strong, dollars were out of reach, and cents were used day to day. People didn't get confused. I am not sure coddling the public and treating them like toddlers is the path towards a sefl-sovereign society. I do understand the arguments, but like many others, it is suspicious that this "decision" is an elitist, top-down initiative. It feels contrived.