Interesting but extinct word of Greek philosophical origin. Closest meaning now is idea, form, or better yet "ideal form".

It's the name of a major game software company too. They don't get to own the word though, because its too cool even for them, but they may own the urban version.
Eidos makes rad computer games, dude.
by Heraclitus of Austin August 7, 2009
It is very similar to pedophiles , but they insist on using children for work rather than pleasure.
That guy is a massive Eido , I called the police.
by urmomknowsmylength January 23, 2022