Q249

{"type":"item","id":"Q249","labels":{"en":{"language":"en","value":"fourth-order class"}},"descriptions":{"en":{"language":"en","value":"metaclass whose instances are classes of classes of classes of individuals"}},"aliases":{"en":[{"language":"en","value":"metametametaclass"},{"language":"en","value":"third-order metaclass"}]},"claims":[],"sitelinks":[]}