I had thought factoid meant "a brief or trivial item of news or information"
But now I googled the meaning and it says,
In most examples of janus words online the meanings are quite exactly opposite. In this case I was not 100% sure. The opposite of a fact or news is an untruth. So since the alternative meaning is only unreliable news and not reliable untruth. Is this not a janus word? what do you all think?
- an item of unreliable information that is reported and repeated so often that it becomes accepted as fact.
"he addresses the facts and factoids which have buttressed the film's legend"
- a brief or trivial item of news or information.
"how does the brain retain factoids that you remember from a history test at school?"
I did not find it in this list.