Omnium - Sounds rather singular and meaningful, doesn't it?
Wikipedia says the word is Latin for "all around the thing" - although with what little I know of Latin, I'd guess it's more like "all thing".
Don't know why this word seems to have been snaffled for the Olympics - and track cycling, at that. It's a very generic construct. Maybe there was no Latin word for Cycling - yet Latin is constantly being updated for the modern world.
I am not too fond of this modern construct/usurpation. Tomorrow's word is another recent coining that gets my goat.
Where did I encounter this word? Sunday, listening to radio, got pulled up by a word I'd never heard before. The casual disbursement of the word itself was more noteworthy than the context.