Temporal vortex: An anomaly in the space-time fabric. Very rare; occurs infrequently, of virtually instantaneous duration and generally very small so that no more than molecules may pass from one temporal context to another. Theoretically may be much larger and longer-lasting, but none such have ever been documented with certainty, although various mysterious disappearances (ref. Judge Joseph Crater, et al.) have sometimes been ascribed to them by occultists.
—Dictionary of Physics, 2309 ed.