Megayear was a unit of time. One megayear equaled one million years. (DTI eBook: The Collectors)
History and specifications[]
Around the year 21,436,000 CE, the Collectors used their obelisk device to gather specimen of endangered species across megayears of the timeline and different worldlines. They pulled Jena Noi, Gariff Lucsly and Marion Dulmur into their timeframe from the 31st century. After security in the Collector Preserve broke down, the Time Guardians stepped in. Lucsly and Time Guardian Jheress bonded across their 21.43 megayear separation over the perennial concerns of temporal protectors. (DTI eBook: The Collectors)