"Millennist" Natural Recordings by Native Speakers
I apologize, but there is no word "millennist". It's possible that you meant "millennialist" or "millenialist", which refers to a believer in the doctrine that Christ's second coming and the end of the world will occur within a thousand years after his ascension.
Millennia refers to a period of one thousand years. For example, the 1st millennium refers to the period from 1 AD to 1000 AD, and the 2nd millennium refers to the period from 1000 AD to 2000 AD. The term is often used to describe long periods of time, such as geological eras or historic events.
A miller is a person who operates a mill, which is a machine used for grinding, crushing, or processing grains, such as wheat, corn, or rice. Miller can also refer to a person who has the surname Miller, which is a common occupational surname originating from medieval Europe, where a miller was considered a skilled and important member of the community.
Millerite is a rare mineral composed of iron disulphide (FeS). It is an ore of iron and is also known as iron pyrite.